It means it is not stainless steel. The 304 mark means that the material is 304 grade stainless steel. The Cui Dahuang 304 pot does not have the 304 mark, which means it is not made of stainless steel. Chuidahuang is the registered trademark of Zhejiang Chuidawang Cookware Co., Ltd. and has been awarded the title of Zhejiang Famous Brand Product. Cui Dahuang focuses on the R&D and production of healthy cookware. Cui Dahuang inherits the Chinese craftsman culture and integrates cookware manufacturing technology with the mission of making healthy cookware that is most suitable for cooking Chinese dishes. Cooperate with the inheritors of eight major cuisines to participate in the design and development of innovative products.