Why doesn't Xuzhou Health Bao have a code?

After registering the information, a pop-up window prompts that Xuzhou Health Bao cannot confirm your health status related to epidemic prevention for the time being. In order to show your health status related to epidemic prevention by using Xuzhou Health Bao, your travel information within 14 days will be verified by the "Traffic Big Data Travel Card".

China's research on coding technology began in 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.