Aerial photo taken on April 22, 2019 shows people working at the Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Crude salt is loaded onto a truck at the Daqinghe salt field in Tangshan City, north China's Hebei Province, April 22, 2019. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Aerial photo taken on April 22, 2019 shows crude salt is collected at the Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Aerial photo taken on April 22, 2019 shows crude salt is collected at the Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Aerial photo taken on April 22, 2019 shows crude salt is collected at the Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Aerial photo taken on April 22, 2019 shows crude salt is collected at the Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)
Aerial photo taken on April 22, 2019 shows workers loading crude salt at Daqinghe salt field in Tangshan City, north China's Hebei Province. Some 270,000 tons of salt is expected to be produced this spring at the Daqinghe salt field. (Xinhua/Yang Shiyao)