As for the amount limit that's transferrable, this is only there to individuals to prevent capital flight (limited to $50,000 per annum), it's not limited to companies.
I remember the last time I tried to buy a flight ticket with Qatar Airways, one of the currencies they accepted was the yuan (kinda upset they didn't accept the sterling). This probably will challenge the US Dollar's role as the dominant currency, which is actually terrible for the US in its long term debt structuring.
Is there anything the US can do, or have we forever ceded the lead?
But the thing is, being the major dominant currency actually comes with drawbacks:
https://equitablegrowth.org/reserve-currency-privileges-cost...
So potentially, the US dollar losing its role as the dominant currency may actually come with benefits for everyday Americans.
It's all just really shitty to have to deal with when it's your own money. So yeah, not looking to "invest" in China until they allow the money to come out no questions asked.
Also, international payments are a pain in the first place. I'm based in London currently contracting for a Singaporean firm, and they've still yet to be able to make the payment due to IBAN, SWIFT code issues. And you'd think that London and Singapore both being global financial centers, it would be easy right?
But yeah, I take your point its really bad having too much restrictions on moving money out of China, although I do think they are trying to change those policies.
And before that, up until 200 years ago, it was the Spanish Dollar ("piece of eight"), which dominated South-American and Central-American trade and was informally accepted in Northern colonies too.
A monetary policy maker at the central bank and a supporter capital controls was ironically denied to exchange USD $20k a year ago when trying to visit an overseas relative. The reason for denial was cited as being over 65 years old and not providing sufficient documents. He didn’t exceed the US $50k limit. [1]
Earlier last year, China made it illegal to transfer for a profit of RMB 100k or with amount exceeding RMB 5M. This was considered as a measure to curb currency exchange among overseas friends and relatives. [2]
Since two years ago, Chinese banks were required to report transfer of at least RMB 50k or US $10k. Seven banks were fined for not keeping track of such transfers. [3]
Also two years ago, bank card withdrawal limits outside of China was reduced to RMB 100k. [4]
With all these additional restrictions, the amount that one can exchange for is way less than US $50k per year (or about RMB 350k at current exchange rate).
Possibly related: The People’s Bank of China just announced that depositing or withdrawing RMB 100k or more will require registration. [5]
[1] https://money.163.com/19/0529/12/EGBJMPI4002580S6.html (in simplified Chinese)
[2] https://www.auliving.com.au/zh-tw/201902/116872.html (in traditional Chinese)
[3] http://finance.sina.com/bg/economy/economy_forex/sinacn/2018... (in simplified Chinese)
[4] https://www.hk01.com/%E8%B2%A1%E7%B6%93%E5%BF%AB%E8%A8%8A/14... (in traditional Chinese)
[5] https://www.msn.com/zh-tw/news/world/%E4%B8%AD%E5%9C%8B%E6%9... (in traditional Chinese)