A merchant presents his goods during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.

Visitors view the exhibits during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.

A child views a drone during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019. (Photos: Xinhua)

Visitors view the artware during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.

Visitors view goods during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.

A merchant introduces her goods during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.

Paper-cutting artist demonstrates her skills during the 12th China Shijiazhuang (Zhengding) International Commodities Fair 2019 in Shijiazhuang, north China's Hebei Province, April 28, 2019.