How to get the QR code of receipt and payment

Open WeChat, click I- Payment-Payment-QR Code Collection-Set Amount, set collection amount and collection comment, click OK, and select Save Collection Code.

Extended information:

QR code introduction:

1. QR code is also called two-dimensional barcode. The common QR code is QR code, and QR is the full name of quick response. This is a very popular coding method on mobile devices in recent years. Compared with the traditional bar code, it can store more information and represent more data types.

2. Two-dimensional barcode is a black-and-white graphic that records data symbol information distributed on a plane (two-dimensional direction) according to a certain geometric figure; In coding, the concepts of "0" and "1" bit streams, which constitute the internal logic foundation of the computer, are skillfully used, and several geometric figures corresponding to binary are used to represent the digital information of characters, which can be automatically read and read by image input equipment or photoelectric scanning equipment, thus realizing the automatic processing of information. It has some commonalities of bar code technology: each coding system has its own specific character set; Each character has a certain width; It has certain verification function. At the same time, it also has the function of automatically identifying different line information and processing the rotation change points of graphics.

3.2065438+On August 3, 2006, the Payment and Clearing Association issued the Code of Barcode Payment Business (Draft for Comment) to payment institutions. The exposure draft clearly points out the security standards that payment institutions need to follow in developing barcode business. This is the first time that the central bank officially recognized the status of QR code payment after the 20 14 QR code payment was suspended.

4. The research on two-dimensional code technology abroad began in the late 1980s, and various code systems were developed in the research of two-dimensional code symbol representation technology, such as PDF4 15, QR code, Code 49, Code 16K, Code One and so on. The information density of these two-dimensional codes is much higher than that of traditional one-dimensional codes. For example, the information density of PDF4 17 is more than 20 times that of one-dimensional code CodeC39.