The contents of the couplets on both sides are health couplets, which exist in Louguantai, a Taoist holy place in Shaanxi. In just fourteen words, the cultivation method of Dan Dao is revealed. Its explanation is: Jade furnace burns medicine to prolong life, and the right way is to repair Yishou Dan. It is said that it was written by Gigi Lai Sr. He gave full play to his profound knowledge and simple philosophical thoughts, and created the Fourteenth Square of Health Preservation by using the method of Six Books, as a way for himself and others to cultivate self-cultivation and prolong life.