Take China Merchants Bank as an example. Generally, customers who already hold a China Merchants Bank credit card and have a credit line close to the gold card of China Merchants Bank credit card up to RMB50,000 can apply. They can't apply online. They can only get the platinum card application form at the business outlets of China Merchants Bank, and attach a copy of identity certificate, work and new financial documents, mainly copies of large deposit certificates, real estate licenses and driving licenses of high-end private cars. If relatively complete financial documents can be provided, it will be more helpful for banks to understand the applicant's personal situation and judge the credit limit.