1. Liu Tiancheng (1876-1904), whose courtesy name was Ruiting, was a native of Chenjiazhuang, west of Fenyang County, Shanxi (now Fenyang City, Shanxi). He loved reading when he was young. In the 27th year of the reign of Emperor Guangxu of the Qing Dynasty (1901), he entered the Oriental Language Department in Taiyuan to study. The following year, he studied in Japan and graduated from Hongwen College. After returning to China, he has been engaged in education. In the 20th year of the Civil War (1931), he served as the supervisor of the County Education Bureau and at the same time served as a member of the County Chronicle Preparatory Committee. In the 25th year of the Republic of China, he worked in the Chronicle Compilation Bureau of Fenyang County and worked as an editor, and began to collect and organize local chronicle documents. He is the author of "Essays on Yunzhai's Journey to the East", "Geography of Fenyang", "Native Chronicles of Xichenjiazhuang", "Fenyang Legacy", etc. 2. Liu Tiancheng, male, born in October 1962, university degree, economist, currently chairman and general manager of Anhui Xiaoliu Food Co., Ltd. He began to engage in melon seed frying in 1980 and founded "Xiao Liu Melon Seed Store". In 1994, he founded "Anhui Xiao Liu Melon Seed Co., Ltd.". The company mainly produces and operates melon seeds and other roasted seeds and nuts, and is determined to become one of the leaders in the food industry with the mission of "innovating food culture and creating a better life". 3. Liu Tiancheng, male, 60 years old, associate professor. Vice president of Jining Zhouyi Research Association. The professional research direction is literary language and modern distance teaching art. I started studying the "Book of Changes" part-time five years ago. I was amazed by the profound dialectical philosophy in the book and gradually deepened it. In order to explore its secrets, I read "Introduction to the Book of Changes" by Liu Dajun and "Modern Translation of the Book of Changes" by Taiwanese scholar Sun Zhensheng, then studied "Essentials of the Book of Changes" written by Song Shusheng in the Qing Dynasty, and then went back to study the original work of "The Book of Changes" to this day. Three years ago, I began to apply Yili to the study of the mutually reinforcing relationship between various related factors in the literary language structure and distance teaching process, and successively published it in "Modern Distance Education". He has published many papers in Taiwan's "Journal of Chinese Culture" and other publications. There will also be a Yili-oriented book "Research on Modern Distance Teaching" published by Petroleum University Press.