The two companies are related. To put it simply, Sanjiu Pharmaceutical Co., Ltd. has authorized Shandong Sanjiu Pharmaceutical Co., Ltd. to produce other varieties, and Shandong Sanjiu’s products are also legal. If necessary, you can go to the "State Food and Drug Administration" website to check. Each product is registered. But to an insider, it looks like a legitimate copycat version.

According to my understanding, they have Shenzhen 999, Sandong 999, Hunan 999 and Jiangxi 999. Alas, the quality of the last three cannot be complimented.