Even if the money from the IPO itself doesnt go to directly to random citizens it still pumps a ton of money into their economy providing capital for other investments in new markets creating jobs, spending on goods/services by the company, hiring internally (IPOs always allow companies to expand), etc etc. That money doesn't just sit in a giant pile being unused, like Scrooge McDuck's gold pile.

Not to mention the training and development it would give a whole new class of people in China to operate global businesses.