Yes
No
Yes. The Chinese wanted to make an example of DiDi for going for the US IPO when it was clear that the Chinese Gov has been actively discouraging its big tech companies from doing so.
So yes, this was a conspiracy to punish DiDi and as a result the US Investors in a legal term, have suffered (or will on Tuesday) "material damages".
Yes, the investigation was the Chinese Gov punching DiDi but the app removal was a bazooka, ie. a dramatic escalation and a very serious move which will have "material harm" to its business operations
It is proof because the US investors invested and bought shares on the company based on that it was not under such serious investigation and that it had its app on the app stores so that it could grow its userbase.
The app removal will harm its user growth. And the investigation, who knows what will happen, a big multi-billion fine or small change to its operation, big change to its operations, more data centers to be built in China (more cost) etc
So as you can see this is Negative for the company thus the share price will be lowered. So the US investors have just (in Tuesday..) lost big money because of the Chinese regulator deliberately being late to its announcement of its investigation and app removal.
And DiDi is also responsible for not strongly making a disclosure for these business risks.
The FT comment I posted previously makes a good list on which parties are responsible for this mess
