The gold card you mentioned should be the credit card gold card of CCB. If you want to apply for a platinum card, of course. CCB's platinum cards are all for middle and high-end customers. I think the annual income of high-end customers must be around 654.38+ 10,000. If you meet the requirements, you can try to apply.
If it is a platinum card, it is suggested that you can provide more financial proof to apply at the outlet, such as the certificate of time deposit or passbook of real estate, automobile production and China Construction Bank, which will help you to review the card.