Under the background of double carbon policy, green electric vehicles are leading the new trend. According to the data in 2020, the global sales of electric vehicles reached 2.944 million, up 44% year-on-year, and more and more people chose electric vehicles. JAC Weilai Automobile, as the leader of electric vehicle brand in China, chose to build its own "Green Future Factory" in Hefei, Anhui. Jianghuai Weilai Factory uses fully automated production lines, which is green and pollution-free while being efficient. In order to improve the quality of vehicle painting and save power cost, the factory uses high-efficiency industrial fans in the automobile painting production line, from the pretreatment of automobile painting to the thermal cycle drying system of the oven, to ensure the quality of automobile painting while saving energy and reducing emissions as much as possible.