March 22, 2017,experts from “Federation of Sinopec”， “Beijing University of Science and Technology” andCHANHEN jointly completed the "test": CHANHEN hemihydratedphosphogypsum new filling material backfilling industrialization。

Experts attendedthe project report, reviewed the relevant information, inspected the scene,carried out a serious inquiry and full discussion on the relevant issues. Thepanel agreed to pass the review and proposed to speed up the application of thetechnology in phosphate mining.