Which home central air conditioner is good in Zhengzhou?

Zhengzhou is a big market, and many central air-conditioning enterprises have branches in Zhengzhou. Gree, Daikin, Hitachi, Haier Mitsubishi Heavy Industries, etc. are the better ones in household central air-conditioning, but none of them has good air-conditioning quality. Up to now, the air-conditioning quality is almost the same, mainly depending on service and after-sales. Now Gree is second to none in Zhengzhou.