five colors. Chef's certificate is divided into five grades, and the cover of each grade certificate has color distinction, so the cover of chef's certificate of Hubei Litaipo Catering Management Co., Ltd. has five colors. Chef's Certificate I * * * is divided into five grades: primary, intermediate, advanced, technician and senior technician. The cover of each grade certificate is colored. The cover of the primary chef's certificate is green, the intermediate certificate is blue, the high certificate is positive red, the technician's certificate is brown and the senior technician's certificate is red-brown.