What part of the 5 year plan outlined the strategy behind why the CCP went after DIDI? I'm genuinely curious and it might be more useful to link to the relevant parts. Some people might actually be interested in reading those and better understanding this.
For what it's worth those 5-years plans used to get changed regularly, at least when my country, Romania, was doing them. For those that can read Romanian I recommend this book [1] about the 5-year plans from the 1970s Socialist Romania.