2 China High Tec 2 International Fiber Journal June 14, 2018 27 Views Sun Yong, general manager of the International Trade Department of Hi-Tech Heavy Industry Co., Ltd., explains the many synergies between the company’s production lines to Klaas De Waal, publisher of International Fiber Journal. Sun Yong, general manager of the International Trade Department of Hi-Tech Heavy Industry Co., Ltd., explains the many synergies between the company’s production lines.