DialogOnSoftwareProjectManagement.rst: include lecture notes on 24 Feb 2020 (afternoon graduate sections).

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@@ -4,7 +4,7 @@ Dialog On Software Project Management
 
 :Authors: Hui Lan (lanhui at zjnu.edu.cn)
 
-:Version: 0.0.6 of 2020-03-21
+:Version: 0.0.7 of 2020-03-22
 
 
 .. contents:: Table of content
@@ -15,6 +15,504 @@ Preface
 
 This book contains a series of special lecture notes in a dialog form on software project management during the Great Lockdown period due to the outbreak of 2019 novel coronavirus.
 
+
+Monday, 24 February 2020
+========================
+
+Afternoon section
+-----------------
+
+*Feature creep - Asynchronous communication - Benefits of open source - Reap the benetifs - Don't throw away your code* 
+
+2020-02-24 14:27:31 系统消息(10000)
+Twizere Pacifique 唐平加入本群。
+
+2020-02-24 14:28:27 系统消息(10000)
+Nicole Rutagengwa 加入本群。
+
+2020-02-24 14:46:34 系统消息(10000)
+mcprizo加入本群。
+
+2020-02-24 14:46:34 Kumson爸爸(3157209053)
+大家好，我是Kumson的爸爸。
+
+2020-02-24 15:34:53 NGOUNOU家长(438499151)
+大家好，我是NGOUNOU 201925800180
+
+2020-02-24 15:40:32 Lan Hui(1348141770)  Hi guys.  Welcome.
+
+2020-02-24 15:40:40 Lan Hui(1348141770)  Where are other guys?  Mary Doe?  Mohamed Moummou?
+
+2020-02-24 15:40:44 Nicole Rutagengwa (1403962700)
+hey sir
+
+2020-02-24 15:40:53 Nicole Rutagengwa (1403962700)
+thank you 
+
+2020-02-24 15:41:09 Nicole Rutagengwa (1403962700)
+i will try to remind them again
+
+2020-02-24 15:41:15 Lan Hui(1348141770)  We will start in 5 minutes.
+
+2020-02-24 15:41:34 Lan Hui(1348141770)  Everyone here living in Beijing time?
+
+2020-02-24 15:41:55 Kumson爸爸(3157209053)
+okay sir
+
+2020-02-24 15:42:16 Lan Hui(1348141770)  It turns out that people like QQ more. 
+
+2020-02-24 15:42:28 Nicole Rutagengwa (1403962700)
+momo went back home 
+
+2020-02-24 15:42:44 Nicole Rutagengwa (1403962700)
+maybe not beijing time 
+
+2020-02-24 15:43:50 Lan Hui(1348141770)  How about Youma and Corneille?
+
+2020-02-24 15:45:16 Lan Hui(1348141770)  Online learning may be less effective than classroom learning.
+
+2020-02-24 15:45:23 Lan Hui(1348141770)  Maybe.  I am not sure.
+
+2020-02-24 15:45:30 Lan Hui(1348141770)  I like online learning more.
+
+2020-02-24 15:45:51 Lan Hui(1348141770)  One hard part is verification and authentication.
+
+2020-02-24 15:46:03 Lan Hui(1348141770)  How do I know you are who you are.
+
+2020-02-24 15:46:08 Nicole Rutagengwa (1403962700)
+qq is better atleast most of us can access it 
+
+2020-02-24 15:46:37 Lan Hui(1348141770)  Where were we left last time?
+
+2020-02-24 15:46:56 Lan Hui(1348141770)  We've talked about feature creep and proprietary software.
+
+2020-02-24 15:47:15 Lan Hui(1348141770)  Uncontrolled feature creep is really bad.
+
+2020-02-24 15:47:20 Nicole Rutagengwa (1403962700)
+i don't know because i couldn.t connect myself
+
+2020-02-24 15:47:35 Lan Hui(1348141770)  It could make your team unable to deliver product on time.
+
+2020-02-24 15:47:37 Nicole Rutagengwa (1403962700)
+can we have a video meeting sir?
+
+2020-02-24 15:47:44 Nicole Rutagengwa (1403962700)
+or audio
+
+2020-02-24 15:47:47 Lan Hui(1348141770)  No video meeting.  I don't like that.
+
+2020-02-24 15:47:59 Lan Hui(1348141770)  I tried Zoom.  Did not work out very well.
+
+2020-02-24 15:48:09 Lan Hui(1348141770)  
+
+2020-02-24 15:48:12 Nicole Rutagengwa (1403962700)
+because chatting is really uncomfortable
+
+2020-02-24 15:48:45 Lan Hui(1348141770)  My sound appears distorted.
+
+2020-02-24 15:49:21 Lan Hui(1348141770)  On the contrary, I think chatting is OK.  Most professionals like chatting.
+
+2020-02-24 15:49:31 Lan Hui(1348141770)  If we could do face-to-face, then do face-to-face.
+
+2020-02-24 15:49:42 Lan Hui(1348141770)  If not, text is far better than video streaming.
+
+2020-02-24 15:49:44 Kumson爸爸(3157209053)
+[表情][表情]
+
+2020-02-24 15:49:58 Nicole Rutagengwa (1403962700)
+but honestly i think then its just better to read the lectures
+
+2020-02-24 15:50:14 Lan Hui(1348141770)  That is one part.
+
+2020-02-24 15:50:24 Nicole Rutagengwa (1403962700)
+because i don.t see us have class while chatting[表情]
+
+2020-02-24 15:50:26 Lan Hui(1348141770)  Reading the lecture notes is useful.
+
+2020-02-24 15:50:44 Lan Hui(1348141770)  Being here is also useful, at least for me.  I have to be here, according to the school policy.
+
+2020-02-24 15:51:12 Nicole Rutagengwa (1403962700)
+could you please accept MArie request
+
+2020-02-24 15:51:19 Lan Hui(1348141770)  I think Kumson is someone who will report to the college?
+
+2020-02-24 15:51:23 Nicole Rutagengwa (1403962700)
+she wants to join
+
+2020-02-24 15:51:28 系统消息(10000)
+Marie加入本群。
+
+2020-02-24 15:51:43 Kumson爸爸(3157209053)
+hahahahah why do you think so sir ??
+
+2020-02-24 15:52:00 Lan Hui(1348141770)  Just guess.
+
+2020-02-24 15:52:11 Kumson爸爸(3157209053)
+I am very okay with you uploading the lectures on the course platform and giving the tasks to perform
+
+2020-02-24 15:52:15 Kumson爸爸(3157209053)
+that's much better 
+
+2020-02-24 15:52:54 Lan Hui(1348141770)  Anyway, please feel comfortable.  Slow down.
+
+2020-02-24 15:53:00 Marie(2928285277)
+Hello Sir
+
+2020-02-24 15:53:10 Kumson爸爸(3157209053)
+due to the fact we are unable to have live streaming (which most students would have preferred), also taking into consideration the time difference for those of us back home and mainland
+
+2020-02-24 15:53:25 Kumson爸爸(3157209053)
+it's just 8Am here 
+
+2020-02-24 15:54:05 Lan Hui(1348141770)  Thanks.  Will consider that.  
+
+2020-02-24 15:54:33 Lan Hui(1348141770)  I usually take attendance in the middle of the lecture.
+
+2020-02-24 15:54:41 Lan Hui(1348141770)  What are we going to cover today? 
+
+2020-02-24 15:54:45 Kumson爸爸(3157209053)
+or you just shrink the readings into a ppt or whatever way works for you 
+
+2020-02-24 15:54:52 Lan Hui(1348141770)  I will cover open source and Netscape.
+
+2020-02-24 15:55:49 Lan Hui(1348141770)  I have posted readings on our course home page.  The current one is about Netscape.
+
+2020-02-24 15:55:57 Nicole Rutagengwa (1403962700)
+another student
+
+2020-02-24 15:56:05 Lan Hui(1348141770)  It actually includes a set of readings.
+
+2020-02-24 15:56:09 Nicole Rutagengwa (1403962700)
+wants to join please accept her request
+
+2020-02-24 15:56:21 Kumson爸爸(3157209053)
+okay then . let's work according to information on our course homepage 
+
+2020-02-24 15:56:46 Kumson爸爸(3157209053)
+maybe attendance could be taken by noting those who submit tasks on time 
+
+2020-02-24 15:56:52 Kumson爸爸(3157209053)
+or within the deadline 
+
+2020-02-24 15:57:10 Lan Hui(1348141770)  [图片]
+
+2020-02-24 15:57:23 Lan Hui(1348141770)  The above screenshot shows your current reading task.
+
+2020-02-24 15:57:44 Lan Hui(1348141770)  I will consider that.  
+
+2020-02-24 15:58:15 Lan Hui(1348141770)  Actually I prefer asynchronous communication when we are physically separated.
+
+2020-02-24 15:58:20 Kumson爸爸(3157209053)
+okay sir
+
+2020-02-24 15:59:10 Lan Hui(1348141770)  [图片]
+
+2020-02-24 15:59:18 Nicole Rutagengwa (1403962700)
+what is asychronous sir?
+
+2020-02-24 15:59:18 Lan Hui(1348141770)  We are on the above slide.
+
+2020-02-24 15:59:35 Lan Hui(1348141770)  Who can explain that?
+
+2020-02-24 15:59:52 Lan Hui(1348141770)  Asychronous: (of two or more objects or events) not existing or happening at the same time.
+
+2020-02-24 15:59:58 Lan Hui(1348141770)  Bing Dictionary.
+
+2020-02-24 16:00:16 Lan Hui(1348141770)  What we are doing now is synchronous.
+
+2020-02-24 16:00:41 Lan Hui(1348141770)  Email is generally considered as an asynchronous communication method.
+
+2020-02-24 16:00:48 Lan Hui(1348141770)  Chatting - synchronous.
+
+2020-02-24 16:01:08 Lan Hui(1348141770)  Things like video conferencing are all synchronous.
+
+2020-02-24 16:01:29 Nicole Rutagengwa (1403962700)
+ohh okay 
+
+2020-02-24 16:01:38 Nicole Rutagengwa (1403962700)
+i get it thanks 
+
+2020-02-24 16:02:03 Nicole Rutagengwa (1403962700)
+some students still waiting for request confirmation sir
+
+2020-02-24 16:02:06 Lan Hui(1348141770)  Open source now is a trend.  Everyone talks about it.  Even Microsoft people have started embracing it.
+
+2020-02-24 16:02:34 Lan Hui(1348141770)  (Are they sure they are entering the correct QQ Group?)
+
+2020-02-24 16:03:35 Lan Hui(1348141770)  Microsoft Edge, for example, used the Chromium core (which is open source).
+
+2020-02-24 16:03:59 Nicole Rutagengwa (1403962700)
+i think so
+
+2020-02-24 16:04:36 Lan Hui(1348141770)  Contrary to proprietary code, open source code can usually be included in our product (for profit) without causing too many worries.
+
+2020-02-24 16:05:24 Lan Hui(1348141770)  (Ask them to scan the QR code to join.  I could not see their join requests.)
+
+2020-02-24 16:05:46 Nicole Rutagengwa (1403962700)
+done sir
+
+2020-02-24 16:06:12 Lan Hui(1348141770)  Guys. Let's take a break (5 minutes).
+
+2020-02-24 16:06:38 Nicole Rutagengwa (1403962700)
+ok
+
+2020-02-24 16:07:27 Marie(2928285277)
+ok
+
+2020-02-24 16:08:46 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+ok
+
+2020-02-24 16:09:00 NGOUNOU家长(438499151)
+ok
+
+2020-02-24 16:09:57 系统消息(10000)
+Twizere Pacifique 唐平邀请Guedalia Youma 加入了本群。
+
+2020-02-24 16:10:09 系统消息(10000)
+Twizere Pacifique 唐平邀请Tabitha加入了本群。
+
+2020-02-24 16:11:15 Lan Hui(1348141770)  Move on.
+
+2020-02-24 16:12:10 Lan Hui(1348141770)  What are the benefits of Open Source?
+
+2020-02-24 16:12:22 Lan Hui(1348141770)  Different people have different answers.  
+
+2020-02-24 16:13:00 Lan Hui(1348141770)  If you are an educational entity (e.g., university), making open source projects can give you more publicity.
+
+2020-02-24 16:14:09 Lan Hui(1348141770)  For educational institutions, using open source software has a moral benefit, too.
+
+2020-02-24 16:14:36 Lan Hui(1348141770)  "Schools have a social mission".
+
+2020-02-24 16:14:40 Lan Hui(1348141770)  https://www.gnu.org/education/edu-schools.en.html
+
+2020-02-24 16:15:14 Lan Hui(1348141770)  "Proprietary software is the enemy of the spirit of education".
+
+2020-02-24 16:15:24 Lan Hui(1348141770)  I think the above statement is a bit too extreme.
+
+2020-02-24 16:16:18 Lan Hui(1348141770)  The main problem or characteristic of proprietary software is that it prevents people from using it in their work (products).
+
+2020-02-24 16:17:00 Lan Hui(1348141770)  For example, a few days before their major release,  they (the Netscape team) noticed that their code depended on Apple's code! 
+
+2020-02-24 16:17:31 Lan Hui(1348141770)  Apple's code is mostly proprietary.
+
+2020-02-24 16:17:46 Lan Hui(1348141770)  So the team had to beg Apple for permission to use their code. 
+
+2020-02-24 16:17:53 Lan Hui(1348141770)  Apple said: "No."
+
+2020-02-24 16:18:08 Lan Hui(1348141770)  The Netscape team then had to re-write that part overnight. 
+
+2020-02-24 16:19:06 Lan Hui(1348141770)  When you want to sell millions of copies of your product (which includes Proprietary code, even just a little) to make profit, then you are going to have headaches. 
+
+2020-02-24 16:20:07 Lan Hui(1348141770)  As a project manager, you should know different kinds of licenses really well.
+
+2020-02-24 16:20:39 Lan Hui(1348141770)  If you want to use a piece of software (code) from elsewhere, study its terms and conditions.
+
+2020-02-24 16:21:20 Lan Hui(1348141770)  If the license is not friendly, you'd better look for an open source alternative, or take the pain to write things by yourself.
+
+2020-02-24 16:21:58 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+i have a question 
+
+2020-02-24 16:22:22 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+can i ask ?
+
+2020-02-24 16:22:43 Lan Hui(1348141770)  Of course.  In the future, you can just type your question without asking.
+
+2020-02-24 16:22:53 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+okay 
+
+2020-02-24 16:23:21 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+Like on Windows , when we publish a .exe  file , meaning that the source codes can not be seen , so how do they know that you used their codes ?
+
+2020-02-24 16:23:53 Lan Hui(1348141770)  Reverse engineering.
+
+2020-02-24 16:24:16 Lan Hui(1348141770)  The binary file contains some tag information (I think).
+
+2020-02-24 16:24:36 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+ooh okay 
+
+2020-02-24 16:24:48 Lan Hui(1348141770)  BTW, you seldom want to do that, because that is very inflexible.
+
+2020-02-24 16:25:26 Lan Hui(1348141770)  Move on.  If you don't have enough hands, you may also consider making your project open source.
+
+2020-02-24 16:25:58 Lan Hui(1348141770)  In other words, if your project is dying, just as Netscape was in 1998,
+
+2020-02-24 16:26:23 Lan Hui(1348141770)  you may hope that the wider world could help you.
+
+2020-02-24 16:26:44 Lan Hui(1348141770)  So you give away your source code for free.
+
+2020-02-24 16:27:42 Lan Hui(1348141770)  But just as Jamie Zawinski (a former Software Engineer at Netscape) pointed out:
+
+2020-02-24 16:27:55 Lan Hui(1348141770)  "you can't take a dying project, sprinkle it with the magic pixie dust of open source, and have everything magically work out. Software is hard. The issues aren't that simple."
+
+2020-02-24 16:29:08 Lan Hui(1348141770)  Even if you make your software open source, chances are that nobody will care.
+
+2020-02-24 16:29:41 Lan Hui(1348141770)  "For whatever reason, the project was not adopted by the outside.  It remained a Netscape (i.e., in-house) project. "
+
+2020-02-24 16:30:34 Marie(2928285277)
+Is that after they made it open?
+
+2020-02-24 16:31:15 Lan Hui(1348141770)  The lesson I learned is that I cannot expect that a dying project will suddenly gain life a few weeks after displaying its source code to the public.  No way.
+
+2020-02-24 16:31:52 Lan Hui(1348141770)  Netscape became Mozilla Firefox (much better now, still a bit struggling).
+
+2020-02-24 16:32:02 Lan Hui(1348141770)  ===============================
+
+2020-02-24 16:32:10 Lan Hui(1348141770)  Let's take a 5-minute break.
+
+2020-02-24 16:40:07 Lan Hui(1348141770)  ===============================
+
+2020-02-24 16:40:10 Lan Hui(1348141770)  Move on.
+
+2020-02-24 16:40:19 Lan Hui(1348141770)  Business model is really important.
+
+2020-02-24 16:40:44 Lan Hui(1348141770)  Business model is crucial if you have (strong) competitors.
+
+2020-02-24 16:41:11 Lan Hui(1348141770)  Like QQ, it does not charge average people anything.
+
+2020-02-24 16:41:56 Lan Hui(1348141770)  Remember: to make QQ run, the company Tencent needs to pay bills on servers and electricity.
+
+2020-02-24 16:42:26 Lan Hui(1348141770)  The demand of servers and electricity is much higher for video conferencing services.
+
+2020-02-24 16:42:56 Lan Hui(1348141770)  How to get enough money to offset the "free of charge" cost here?  
+
+2020-02-24 16:43:11 Lan Hui(1348141770)  Frankly, I am not quite sure.
+
+2020-02-24 16:43:37 Lan Hui(1348141770)  Maybe the company could make profit from other avenues, e.g., games, advertisements, social influence, government funds, etc. 
+
+2020-02-24 16:44:30 Lan Hui(1348141770)  The more people use your product, the easier it is to convince venture capital.
+
+2020-02-24 16:45:24 Lan Hui(1348141770)  How about the business model of open source?
+
+2020-02-24 16:46:09 Lan Hui(1348141770)  Two things I can imagine are More Publicity and Reap the Benefits.
+
+2020-02-24 16:47:06 Lan Hui(1348141770)  [图片]
+
+2020-02-24 16:47:57 Lan Hui(1348141770)  Sometimes it is good Just to let outsider know you are doing something.
+
+2020-02-24 16:48:29 Lan Hui(1348141770)  The outsider (e.g., funding agencies) would then consider giving you opportunities.
+
+2020-02-24 16:49:01 Lan Hui(1348141770)  The opportunities can be in the form of direct funding, or contracts.
+
+2020-02-24 16:49:41 Lan Hui(1348141770)  Quite similar to fans in social media.
+
+2020-02-24 16:49:50 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+Wow Interesting 
+
+2020-02-24 16:50:28 Lan Hui(1348141770)  If you have 1 million fans, then you have a big social impact.
+
+2020-02-24 16:50:46 Lan Hui(1348141770)  Reap the benefits.
+
+2020-02-24 16:50:52 Lan Hui(1348141770)  Hiring people is expensive.
+
+2020-02-24 16:51:28 Lan Hui(1348141770)  Let's reap the stuff done by other companies, by just paying a few employees in my company to join that open source project.
+
+2020-02-24 16:52:29 Lan Hui(1348141770)  Microsoft reaped the chromium project.
+
+2020-02-24 16:52:40 Lan Hui(1348141770)  The Edge browser is an example.
+
+2020-02-24 16:53:12 Lan Hui(1348141770)  Microsoft abandoned IE which they had been actively developing for almost 20 years!
+
+2020-02-24 16:53:34 Lan Hui(1348141770)  Microsoft is good at strategy.  Not just programming skills.
+
+2020-02-24 16:53:53 Lan Hui(1348141770)  Huawei reaped Hadoop.
+
+2020-02-24 16:54:05 Lan Hui(1348141770)  Ubuntu reaped Debian.
+
+2020-02-24 16:54:13 Lan Hui(1348141770)  So on, so forth.
+
+2020-02-24 16:54:53 Lan Hui(1348141770)  [图片]
+
+2020-02-24 16:55:37 Lan Hui(1348141770)  There must be Big Reasons behind the open source movement (in the software industry).  I mentioned two of them.  I don't think I know all the reasons.
+
+2020-02-24 16:55:50 Lan Hui(1348141770)  We could explore more in the future.
+
+2020-02-24 16:56:08 Lan Hui(1348141770)  Opening up your project is not an easy task.
+
+2020-02-24 16:56:22 Lan Hui(1348141770)  If it were easy, Netscape would have succeeded in doing that.
+
+2020-02-24 16:56:45 Lan Hui(1348141770)  Netscape had millions of lines of code.  That amount could scare people away.
+
+2020-02-24 16:57:22 Lan Hui(1348141770)  How could an outsider understand such a huge codebase?
+
+2020-02-24 16:58:10 Lan Hui(1348141770)  A major challenge is to let outsiders understand your project.
+
+2020-02-24 16:58:20 Lan Hui(1348141770)  If they could understand part of the code, it would be great.
+
+2020-02-24 16:58:28 Lan Hui(1348141770)  Don't expect too much on that in a short period of time.
+
+2020-02-24 16:59:01 Lan Hui(1348141770)  In the first couple of months, an interested outsider probably cannot contribute any line of code.
+
+2020-02-24 16:59:37 Lan Hui(1348141770)  That is quite normal.  He may ask a few questions, most of which you already know too well and have answered many times (boring and seemingly counter-productive).
+
+2020-02-24 17:00:12 Lan Hui(1348141770)  BTW, an outsider does not have to contribute Code in order to contribute to the Project.
+
+2020-02-24 17:00:35 Lan Hui(1348141770)  Sometimes, just some positive feedback, some suggestions, or directions, are really helpful.
+
+2020-02-24 17:01:02 Lan Hui(1348141770)  Anyway, you need to set up many things before you can open source your project.
+
+2020-02-24 17:01:22 Lan Hui(1348141770)  Less work if you just keep the project in-house!
+
+2020-02-24 17:01:46 Lan Hui(1348141770)  Does not hurt your image when your code is really lousy if it is private.
+
+2020-02-24 17:02:06 Lan Hui(1348141770)  ===============================
+
+2020-02-24 17:02:15 Lan Hui(1348141770)  Five minutes break.
+
+2020-02-24 17:03:07 Marie(2928285277)
+ok
+
+2020-02-24 17:05:24 Lan Hui(1348141770)  ===============================
+
+2020-02-24 17:05:37 Lan Hui(1348141770)  [图片]
+
+2020-02-24 17:06:04 Lan Hui(1348141770)  Competition between Netscape Communications and Microsoft.
+
+2020-02-24 17:06:27 Lan Hui(1348141770)  [图片]
+
+2020-02-24 17:06:42 Lan Hui(1348141770)  [图片]
+
+2020-02-24 17:07:10 Lan Hui(1348141770)  One big mistake Netscape made is throwing away their old code and trying to start from scratch.
+
+2020-02-24 17:07:18 Lan Hui(1348141770)  A Really bad decision.
+
+2020-02-24 17:07:40 Lan Hui(1348141770)  Code always looks quite messy, old or new.
+
+2020-02-24 17:07:51 Lan Hui(1348141770)  DON'T THROW AWAY YOUR CODE.
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+2020-02-24 17:08:39 Lan Hui(1348141770)  Never throw your code (which has cost you tons of money, enormous time, many sleepless nights, etc) in the commercial world.
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+2020-02-24 17:09:32 Lan Hui(1348141770)  Live with messy code and make it better each day,
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+2020-02-24 17:09:43 Lan Hui(1348141770)  instead of furiously throwing it away.
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+2020-02-24 17:09:58 Lan Hui(1348141770)  That is pretty much for today.  
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+2020-02-24 17:10:35 Lan Hui(1348141770)  Read this article on Not Throwing Old Code after class.  https://www.joelonsoftware.com/2000/04/06/things-you-should-never-do-part-i/
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+2020-02-24 17:10:44 Lan Hui(1348141770)  ===============================
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+2020-02-24 17:10:58 Lan Hui(1348141770)  Now I am taking attendance.  Please reply with your student number.
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+2020-02-24 17:11:24 NGOUNOU家长(438499151)
+201925800180
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+2020-02-24 17:11:28 Twizere Pacifique 唐平<pacitwizere@hotmail.com>
+201925800174
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+2020-02-24 17:11:35 Marie(2928285277)
+201925800173
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+2020-02-24 17:11:36 Nicole Rutagengwa (1403962700)
+201925800169
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+2020-02-24 17:12:06 系统消息(10000)
+Guedalia Youma 撤回了一条消息
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+2020-02-24 17:12:43 Guedalia Youma (3014432207)
+201925800221
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 Monday, 2 March 2020
 ====================