They are sold offline. There are many places online and offline, such as Tmall, JD.COM, 1, and so on. For example, there are some health stores and pharmacies. Among them, the enzymes that can be sold in China, one is from Japan and the other is from Taiwan Province Province, China. Among them, the most powerful enzyme is Dahan enzyme in Taiwan Province Province, China, which has a history of more than 30 years.