The national unified price of pharmacies is 80 yuan, with 90 capsules per bottle. It is recommended to take two capsules a day. There is an authorized store of Yangshengtang on Taobao, which can be bought on Taobao. It's cheap, but the lowest price should be above 59 yuan/bottle, otherwise it's suspected of being a fake. Also, there is a security code on the bottle. You'll know if it's true or not when you buy it.