Sichuan Jiaoan B certificate is educated every three years. According to the relevant information, Sichuan Jiaoan B certificate is once every three years, and it can also be once every three years. Safety Class B certificate is a kind of certificate in the construction industry, which refers to the person in charge of construction project management who has obtained the qualification of registered construction engineer and is authorized by an enterprise as a legal person. That is, the so-called builder cooperates with B's inspection.