If you are a QDII/QFII, then yes, you can get an institutional feed and use whatever platform you want. Since you are trading CSI300 futs now, you are probably in China, I would say, get MultiCharts. It is not the best, but they work with a lot of brokers in China. I DO NOT KNOW IF THE CHINESE VERSION HAS AN ENGLISH INTERFACE. You can contact them on QQ and ask. Multicharts is handled by a ShangHai company. https://www.multicharts.cn/ China is a places that are hard for westerners to trade. Since there is not much demand for English trading software. They really do not care about putting out English software. The push out crappy, cheap software for the masses.
Chinese futures`markets basically following the international markets(except stocks markets),so I don`t know why you like to do the trades in China. Many of its residents invest overseas in many ways of stocks,futures,forex,CFDs...etc.
Doesn't look like it for CQG. http://www.cqg.com/partners/exchanges/symbols Good luck on your mission. I hope the PLA don't come find you if you start taking to much $$ of our Chinese friends.