How to choose a nice ergonomic chair？

Regarding computer chair, what brand is good? How to choose a nice ergonomic chair？
There are various computer chairs on the market: ergonomic chair, computer sofa, gaming chairs and even the most common up-and-down computer chair.
The most recommended: ergonomic computer chair
How to choose a nice ergonomic chair? Taking computer chair of Ri Rong brand as an example, it can be summarized as follows:
A good computer chair has five parts: foot, pressure bar, chassis, cushion and backrest.
The first part is five-star feet. They bear the weight of the human body and are related to the durability of the chair.
The second part is barometric bar, which is responsible for lifting the computer chair.
The third part is cushion, which must fit the curve of the buttocks and thighs.
The fourth part is backrest. This part must be fit the curve of the human spine as closely as possible.
The fifth part is chassis, which is the brain of the chair.Almost all functions are achieved through base.