1684年（清康熙二十三年），时任太医院吏目的乐显扬因医术高超、医德高尚，被康熙皇帝诰封为“登仕佐郎”
In 1684, the 23rd Qing Kangxi reign, Mr. Yue Xianyang, the senior physician and instruction at the Imperial Hospital, was officially conferred on him a ninth-grade official rank by Emperor Kangxi of the Qing dynasty for his excellent medical skills and professional ethics.