1, using personal payment QR code, each payment platform will limit the transaction amount. Using the QR code of the merchant, you don't have to consider these issues.
2. Using the merchant QR code, the corresponding rate will be given every month according to the collection situation, but the personal QR code is not.
3. The QR code of the merchant is fixed, corresponding to the account number of the merchant, and a special application is required. Ordinary QR codes are generated instantly, which is different every time and has timeliness.
1, the research on QR code technology in China began at 1993. China Article Coding Center has conducted translation and tracking research on several commonly used technical specifications of two-dimensional codes, such as PDF4 17, QRCCode, Data Matrix, Maxi Code, Code 49, Code 16K and Code One. With the continuous improvement of China's market economy and the rapid development of information technology, the demand for QR code, a new technology, is increasing in China. With the strong support of the former State Bureau of Quality and Technical Supervision and the relevant state departments, China Article Coding Center has continuously deepened the research on QR code technology. On the basis of digesting relevant foreign technical data, two national standards of two-dimensional code are formulated: two-dimensional code grid matrix code (SJ/T 1 1349-2006) and two-dimensional code compact matrix code (SJ/T 1 1350-2006), which greatly promotes the development of the two-dimensional code.
2. Each coding system has its own specific character set; Each character occupies a certain width; It has certain verification function. At the same time, it also has the characteristics of automatically recognizing different line information and dealing with graphic rotation changes. Two-dimensional code is a more advanced barcode format than one-dimensional code. One-dimensional code can only express information in one direction (generally horizontal direction), while two-dimensional code can store information in both horizontal and vertical directions. One-dimensional code can only be composed of numbers and letters, while two-dimensional code can store Chinese characters, numbers, pictures and other information, so the application field of two-dimensional code is much wider. 2D barcode/QR code can be divided into stacked 2D barcode and matrix 2D barcode. The stacked/row-arranged two-dimensional bar code is formed by stacking a plurality of rows of chopped one-dimensional bar codes; Matrix two-dimensional bar code consists of a matrix, in which binary "1" is represented by dots and binary "0" is represented by spaces, and the arrangement of dots and spaces constitutes a code. The principle of QR code can be described from the principle of matrix QR code and the principle of determinant QR code.