The working committee of refrigeration and air conditioning engineering, the China Refrigeration and air conditioning industry association (hereinafter referred to as CRAA Engineering Committee), is one of the China Refrigeration and air conditioning branches association. Members are mainly engaged in the after-market service enterprises such as refrigeration and air conditioning engineering installation, maintenance, repair, and energy-saving services, customers of after-market services such as property, hospital, hotel, public institutions, Engineering Department of real estate and engineering facilities department of the factory, as well as national after-market service participated by relevant colleges, enterprises, and institutions engaged in the management and research of after-market service of refrigeration and air conditioning Management of the mainstream industry association branch. Current Engineering Committee has established 31 provincial-level work stations and 294 local contact points in China, with more than ten thousand participating enterprises, and has compiled and issued the development report on refrigerations after-market service industry and air conditioning. The information makes a comprehensive investigation of the industry and enterprises. As of December 31, 2019, the number of enterprises engaged in after-market service of refrigeration and air conditioning has reached 584431, and the output value of future market service will exceed Over 300 billion yuan/year (excluding stock). Carry Out Technical and Technical Exchanges, Cooperate with The National Games’ work, Organize Industry Forums, and Commend Honest Enterprises, Industry Craftsmen and Excellent Projects In The Refrigeration And Air Conditioning Aftermarket Service Industry. The working committee of refrigeration and air conditioning engineering of the China Association of refrigeration, air conditioning industry is willing to help foreign enterprises engaged in refrigeration and air conditioning aftermarket service enters the Chinese market and seeks business opportunities in China.