When China "Banned" Bitcoin it crashed. When they unbanned it the price skyrocketed. Banning ICOs means most citizens will not risk imprissonment and will be out of the market. Resuming the ICO trading with regulation only means more investment $$ getting pumped back into ICO platforms..
In China regulation is virtue. It means the government has legitimized the use. Sure in the west it gets bad headlines and does mean less profit, but even in the west it does legitimize too since you understand what the establishment is expecting.
Neo is also not a currency, but like ethereum, more of a platform. The government could have a separate currency than NEO and NEO run their existing functions of the stock market. But than again, they should just make a NEO token to make that easier. I am skeptical whether the government can create a competing NEO with smart contracts, daps, and ICO tokens required to replace their existing stock market. But who knows.
However, NEO is already developed NOW and taking off. With proper regulation confidence will soar in China meaning other investors around the world will get confidence too and pile in.