Different banks have different approval standards for credit card applications. This is the bank's internal standard and you cannot confuse it.
Generally speaking, the reason why your application for a China Construction Bank credit card is rejected is because your current comprehensive score fails to meet the standards set by the China Construction Bank system, so this time your card application was rejected by the system. Because there are many standards for system review, including the applicant's work situation, income, personal financial situation, etc., since this is the result of the system's comprehensive assessment, it cannot be changed.
If you still want to apply for a China Construction Bank credit card, it is recommended that you apply again after a period of time, or when your income or other conditions change. In addition, generally after your application for a China Construction Bank credit card is rejected, it is recommended that you try to supplement your financial information and reapply after 3 months.