Is BYD's mask expensive?

BYD used to make cars, but now it has suddenly switched to producing masks, so the price of masks must be very expensive, but it is not expensive. According to the notice issued by BYD in March, at that time, BYD put on the market disposable medical masks, each of which did not exceed that of 2.5 yuan. Now with the substantial increase in mass production, I believe the price will be lower. If it is a large-scale export, it is estimated that it will be sold at the wholesale price.