I am the agent of Hainan Yangshengtang in Yichang, Central China. I tell you responsibly that all the products of Yangshengtang, except those made in Hainan, are counterfeit, and there will be no side effects after eating them, but the effect is not as good as that made in Hainan. The cost of Shanghai Yangshengtang is very low, so it is not convenient to say more.
Go to the drugstore and change it to Hainan. You should change it! I hope I can help you.