Yingbin Old Ham, also known as Tianjin No.2 Factory Old Ham, belongs to Tianjin's traditional food taste and has been labeled as Tianjin. This kind of casing is limited by season. For example, if it is dry in spring or autumn, there will be no problem. However, when it is humid in summer, the casing is easy to breed bacteria, which will affect the quality of old ham more or less.