Jining, February 13 - 503 cubic meters of paste filling slurry was transported from Xinhe Mine's surface filling station was pumped to the underground 5303 filling face. This marked the operation of filling mining project of Shandong Energy Zibo Mining Group. Kang Ge company, the hosting institution of the filling engineering department, had solved the technological challenge of building a paste filling pump across the distance of more than 5,300 meters and the depth of nearly 1,000 meters, creating two new records in the national coal system. The project broke ground on April 16, 2018, and was completed by the end of December last year. The R&D process of the project had produced two national industry standards, filling the technical gap in the domestic paste filling industry.