Weng Wenxue, suffering from a common cold with high fever, had a black coating on his tongue and was extremely thirsty, his condition was severe. At that time, his brothers from the Jixun family were gathered around him, shedding tears, and all the doctors were at a loss. Zhongchun administered a large dose of Baihu Tang with three qian of Ginseng, and after one dose, he immediately revived. Someone asked Zhongchun if he had a secret method for treating cold-damage disease. Zhongchun replied, "Thoroughly studying the works of Zhongjing is the secret method."