The door - window project is invested and constructed by the 25th China Railway Bureau. The project has a total land area of 145 mu and a total building area of about 340,000 square meters, including 220,000 square meters above - ground and 120,000 square meters underground. The total investment of the project is 1.22 billion yuan. On June 14, 2018, Xi Jinping, General Secretary of the Central Committee of the Communist Party of China, President of the People's Republic of China, and Chairman of the Central Military Commission, visited Sanjianxi Village to learn about the rural revitalization situation. (The picture above shows Gao Shuzhen, Secretary of the Party Committee of Sanjianxi Village, reporting the rural construction situation to President Xi.)