Generally, Shanghai Yangshengtang is sold online, just like the packaging of Hainan Yangshengtang. In fact, if you look closely at the place of production and specifications, you will find that. The genuine product is Hainan, and the fake product is Shanghai. Besides, my family has a physical pharmacy. The product specification of this Yangshengtang is 250mg* 160 capsules. Fake ones are cheap. I've seen them before. If you look closely, it's easy to tell. The fake packaging is similar to pink, and the genuine one is light golden yellow.