Due to the Institute of Geochemistry of Chinese Academy of Sciences and Li Jiajun, president of Tianjin University. The Institute of Geochemistry of Chinese Academy of Sciences once moved from Guizhou to Tianjin for development, so I got to know the director of Tianjin Science and Technology Commission. Then Li Jiajun became the president of Tianjin University. When Liu Congqiang visited Tianjin University, he found that Tianjin University had "mining knowledge" at the beginning of its establishment, and many famous earth scientists had studied and worked in Tianjin University. Therefore, Liu Congqiang decided to come to Tianjin University.