A worker tests a smart fitness gear at a sports equipment company in Haixing County of Cangzhou, north China's Hebei Province, Dec. 12, 2018. Haixing County saw sound development in its sports gear industry under government support, which helped form an industrial cluster with its own research and development, manufacturing and sales sectors. The county now has some 100 sports gear manufacturers with an annual output value of over 1.2 billion yuan (170 million U.S. dollars). Their products are sold to markets both home and abroad. (Xinhua/Wu Jianlu)