Tongrentang was founded in 1669 (the eighth year of Kangxi) as Le Xianyang, also known as an old shop in Le Jia.
Lezu was born in Ningbo, Zhejiang Province, and moved to Beijing during the Yongle period of Ming Dynasty. His descendants became officials of TaiYuan and founded Tongrentang Pharmacy. His son, Le Feng Ming, inherited his ancestral business, summed up the previous pharmaceutical experience, and completed the book "Formulas for Making Pills, Powder and Pills handed down from generation to generation by Xerox", which clearly put forward the instruction that "although the processing is complicated, it does not save labor, although it tastes expensive, it does not save material resources". Establish a sense of "no one saw the reconciliation, but they knew it on purpose".
1723, Tongrentang was dedicated to Yong Zhengdi in the Qing Dynasty. Later, Tongrentang independently operated official medicine 188, and experienced eight emperors.
"No one sees reconciliation, but God knows" means that you should not go against your conscience and forget justice without supervision, because God knows everything you do.