What information will be left when scanning the code into the hotel?

If you scan the health code in the hotel, it will leave a trace, because as long as you scan the health code, it will be recorded.

Code scanning is the function of identifying two-dimensional codes and barcodes, which can identify the information of the two-dimensional codes and barcodes published according to the specified code distribution rules, and realize the business of collecting money, paying, downloading applications and opening websites corresponding to the two-dimensional codes and barcodes.

Two-dimensional code is also called two-dimensional bar code, and the common two-dimensional code is QR code, which means quick response. It is a very popular coding method in mobile devices in recent years, which can store more information and represent more data types than traditional bar codes.

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 numerical information of characters, which can be automatically read by image input equipment or photoelectric scanning equipment to realize the automatic processing of information. It has some characteristics of barcode technology: each code system has its own specific character set.