According to the survey released by the Market Research Institute of the State Council Development Research Center, by 20 15, the overall scale of the national central air-conditioning industry has doubled compared with 2009, and the number of domestic central air-conditioning users has exceeded 5 million, increasing at the rate of 10% every year. According to the annual average maintenance cost of 30,000 yuan, the central air-conditioning maintenance market will reach more than150 billion yuan.

I have a relative who used to do air conditioning maintenance. He is too old for aerial work. So he went to a place called Bi Zhuo Central Air Conditioning for training. I have been working for one year now, with a monthly salary of more than 8 K.