Need. It is necessary to conduct training and assessment in the local human resources and social security department or relevant vocational training institutions and obtain the corresponding vocational qualification certificate. When applying for Gree air-conditioning installation work number, relevant materials should be prepared for review; Pay attention to the requirements of the installation service center in order to obtain the installation work number; It is necessary to participate in Gree air-conditioning installation training in time to improve installation skills; Pay attention to safety measures during installation to avoid accidents.