Not mandatory. There are no mandatory national standards for liquor in my country. Generally, the recommended national standard number (GB/T), local standard number (DB) and enterprise internal standard number (Q) are implemented. The first two standards are generally public, and enterprise standards are maintained by relevant departments. It can be used after registration. Jiannan Road is a registered trademark of Sichuan Mianzhu Jiannanchun Winery Co., Ltd.