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 1st Qing Yongzheng reign, Tongrentang initiated its medication supply to the Qing Imperial Palace, over the eight reigns , for 188 years.