The commissioning run test of tailing backwater pipeline system on Mar. 16, 2017 is a significant time node for Pulang Copper Mine project (Phase I mining and mineral processing). Through hard work day and night, the pipeline laying for 446m inclined shaft and 2,371m drift, the most difficult work, is completed at 4:00 am on Mar. 10, indicating that the whole tailing conveying pipeline completely connected. The hard work and quality service of CINF Pulang project team are well received by the owner.