Changsha Yijian Yueyahui is regular. According to the relevant information inquiry letter, Yijiantang is a registered trademark of Hubei Yijiantang Technology Co., Ltd. Health preservation is a verb and can also be a noun. It originally refers to a medical activity that uses various methods to maintain life, enhance physical fitness, and prevent diseases, thereby prolonging life. Yang means to nurse, maintain, and replenish. Sheng means life, survival and growth. "Health preservation" in the modern sense refers to active physical and mental maintenance activities based on the laws of human life processes.