Why is the gray ergonomic chair more expensive than the black one?

Gray is in high demand. According to Baidu map query, gray ergonomic chairs are more expensive than black because the demand for gray is high. The ergonomic chair is elegantly designed, unique, fashionable and lightweight. It is a new type of environmentally friendly health chair that is widely used in modern homes, entertainment, Internet cafes, hotels, leisure, conference rooms, and office computer desks.