The threshold for opening an account includes age, credit and funds.

1. Age: The account holder and the transaction executor must be adults and have full capacity for civil conduct.

2. Credit: Personal credit information is good, and there are no serious bad credit records, and there are no laws, administrative regulations, departmental rules and other regulations prohibiting or restricting participation in investment transactions in the US stock market.

3. Funds: There are certain trading funds, and different brokerage platforms have different requirements for funds.