The two companies are related. Simply put, Sanjiu Pharmaceutical authorized Shandong Sanjiu Pharmaceutical to produce other varieties, and Shandong Sanjiu's products are also legal. If necessary, you can go to the website of the US Food and Drug Administration. Every product has a record. But insiders think it is a legal copy.
As far as I know, they have Shenzhen 999 Shandong 999 Hunan 999 Jiangxi 999. Alas, the quality of the last three companies is not flattering.