Wǒ de zhèngquànzhànghù lǐ hái yǒu yìxiē gǔpiào méi mài.
There are still some stocks in my brokerage account that I haven't sold.
Tips
usage
In mainland China, a 证券账户 is distinct from the linked 资金账户 (cash account) at the broker. Retail investors open one with a 券商 (brokerage) and tie it to a bank card via 银证转账.