You can have a look at Gaotian ergonomic chair. A friend of mine saw this brand of chair in Guangzhou Design Week, tried it and felt very comfortable. He chose one on the Internet himself and recommended it to me. Ergonomic chairs within 2000 yuan have a good sense of sitting, are more comfortable to sit on, have a beautiful design, have many practical functions and can be adjusted.

This is a picture of my friend's chair. My chair is still on the way.