Compared with Daikin, Toshiba, mitsubishi electric, Mitsubishi Heavy Industries, Panasonic, Hitachi, Fujitsu and Gree and Midea in China, Fujitsu's central air conditioning system is relatively stable. Fujitsu is a little cheaper than Mitsubishi Daikin Hitachi and a little more expensive than domestic Gree. The quality of Fujitsu is good, but the business model is not clear. Daikin and Mitsubishi are doing well. Mitsubishi is more expensive, and Daikin has a higher share. In Shanghai, Hangzhou, Beijing and other big cities, office buildings are basically Daikin, because Daikin's system is relatively mature. Also, if you decide to use Fujitsu's air conditioner, don't compare it with Gree, it's especially beautiful. That's really incomparable. Gree, which pursues cost performance, is ok, and the advantage of beauty is cheap. Mitsubishi has good quality, Daikin is quiet and energy-saving.