Flexible employees can log on to the website of People's Republic of China (PRC) State Taxation Administration of The People's Republic of China Electronic Taxation Bureau, or download and register the mobile phone APP, declare themselves by logging in as a natural person, and choose to complete the payment through UnionPay, WeChat and Alipay. Flexible employees can choose "WeChat", "Alipay" and "China UnionPay Express" mobile APP channels to declare and pay social insurance premiums. The application scope of "WeChat" and "Alipay" is this month's declaration and prepayment declaration based on the lower limit of payment base. The path is: "Alipay-Citizen Center-Social Security". "China UnionPay Express" is applicable to this month's declaration and prepayment declaration. The path is "China UnionPay Express-Local Service Social Security Payment".