It depends on the platform you make. If you want to trade in dollars when trading outside the market, you can deposit in RMB, and the platform will convert it into dollars according to the exchange rate at that time and call it into your account.

If it is a domestic platform, it can be traded in RMB. Look at the specific situation.

Account opening process:

Provide ID card and bank card photos.

Open an account in official website or let the staff open an account.

Bind the bank card and save money. Then we can make a deal.