On July 22-23, 2022, Du, the second-level inspector of the Labor and Economic Work Department of the All-China Federation of Trade Unions, and Sun and his party, vice chairman of the Municipal Federation of Trade Unions, came to Bibi to conduct spot checks on the mass supervision and inspection of safety production of gas enterprises carried out by local trade unions.
Du, 1965, a native of Dacheng, Hebei. He is currently the executive director of China Calligraphy and Painting Research Institute, a member of Hebei Branch of China Calligraphers Association and a member of Calligraphy Research Association.