Comac
I remember reading the Chinese had stagnated investment into Comac because it was more cost effective for their airlines to buy Boeing planes instead. But after the two 737-MAX crash, the Chinese was restarting investment and R&D for a Boeing replacement, however because they were far behind due to lack of investments, they wouldn't have anything ready until 2026 the earliest. So I doubt they will be able to compete anytime soon.
Being accused isn't the same as being found guilty. Especially in the case of real estate, there is always a possibility that what he did to skirt to law and obtain that wealth may not actually be illegal.
That being said I don't know enough on the laws or what he did, but it's probably likely why China hasn't killed him yet. They likely are doing a more drawn out investigation to find out if it's their own poorly written policies that enable men like this to obtain that wealth and what to do to correct it in the eyes of common Chinese citizens.