"Shanghai International Energy Exchange (INE) plans to conduct its whole market test of TAS (Trade at Settlement) on Crude Oil Futures in production environment on August 22, 2020 (Saturday). Please refer to enclosed TAS on Crude Oil Futures Test Guide for reference." for detail https://qmhedging.blogspot.com/2020/08/shanghai-ine-announcement-on-whole.html
As long as there is tight capital control in place, it's not going to attract much foreign investors or investment except maybe from neighbouring countries and countries that live off China. China's RMB is not going to become the world's reserve currency any time soon although that is the ambition of China that it wants to see one day RMB to be used everywhere in the world but until then there are still others who live in other countries that use other currencies and for any money that they make in RMB, they are going to want to convert it into the currencies that they use back home, take it with them to use it back in their own countries. China is not allowing that right now. It wants foreign investors to keep all the money that they make to be confined in China and that's not going to work. So until China is willing to lift off or at least ease capital control that's in place for foreign investors, then no foreign investment or trading by foreigners.