This was patented and developed by Du Zhizheng, director of the Biochemistry Research Center of the General Logistics Department of the Chinese People's Liberation Army, and many senior leaders are taking it. In the past, Anjitang was selling it, but later Tianzhiyu Health Management Co., Ltd. bought out the patent rights, and they became Tianzhiyu's. And now Tianzhiyu can only be purchased on the membership platform, and the effect is quite good.