Static QR code payment cannot exceed 500 yuan. Barcode payment specifications will be implemented from April 1, 2018. Scan code payment is divided into four risk levels, among which dynamic code scan is divided into 3 levels, while static bar code has the lowest risk prevention ability, which is D level. Among them, if the risk prevention capability reaches Level A, that is, if two or more valid elements including digital certificates or electronic signatures are used to verify the transaction, the single-day cumulative limit can be independently agreed upon with the customer through an agreement; the risk prevention capability reaches Level B, that is, if two or more valid elements excluding digital certificates and electronic signatures are used to verify transactions, the cumulative transaction amount of a single bank account or all payment accounts of the same customer in a single day should not exceed 5,000 yuan; risk The prevention capability reaches level C, that is, if less than two types of elements are used to verify transactions, the cumulative transaction amount of a single bank account or all payment accounts of the same customer in a single day should not exceed 1,000 yuan. Static barcodes refer to barcodes that are valid for a long time, such as QR codes posted by merchants on the counter. Currently, static barcodes are considered one of the riskiest areas of payments. Since static barcodes are easy to be tampered with or altered, and can easily carry Trojans or viruses, the central bank stipulates that if static barcodes are used for payment, the risk prevention capability is level D, and the cumulative transaction amount of the same customer bank or payment institution in a single day should not exceed 500 yuan.