On October 8, the concrete pouring of the second floor roof of the water treatment structure was completed, indicating the main structure was done in the second phase of Ozone water supply project in the Democratic Republic of the Congo. The project construction includes: administrative building, pharmaceutical warehouse, water treatment structure, backwashing pump room, clean water pool and homogenization pool, etc., with total concrete volume reaching 12,000 m³. The owner requires the main structure should be completed by October 31, 2023, half year ahead of schedule, so as to provide support to the presidential campaign. The project team arranged the process rationally, organized employees to work overtime, and completed the main structure 22 days ahead of the deadline required by the owner.