When Zhang Zhongjing, a medical sage, went to Nanyang Prefecture, there was a period of popular folk plague. In order to ensure that the treatment room was not delayed, Zhang Zhongjing opened an outpatient department in court. He treats patients when there are patients, and reads documents when there are no patients (what an excellent red and professional civil servant! Pay tribute to the saints thousands of years ago! ), the people feel its kindness and call it "Mr. Zuo Tang."

Because of its outstanding contribution and great personality charm in the history of medicine, and in order to show respect and obedience to Zhang Zhongjing's spirit of always caring for patients, most people who opened up the light in later generations were named after "XX Hall", such as Tongrentang \ Yangshengtang \ Darenchang \ Yichun Hall, etc.