1723年（清雍正元年），同仁堂開始為清宮供御藥，歷經雍正、乾隆、嘉慶、道光、咸豐、同治、光緒、宣統八代皇帝，長達188年。
In 1723, the 1^st Qing Yongzheng reign, Tongrentang initiated its medication supply to the Qing Imperial Palace, over the eight reigns , for 188 years.