Researchers collect rice crop samples at the demo site of Qingdao Saline-Alkali Tolerant Rice R&D Center in White Clay Park in Qingdao, east China's Shandong Province, Oct. 25, 2019. The saline soil R&D center, based in east China's Qingdao, began field testing in Xinjiang, Heilongjiang, Shandong, Zhejiang and Shaanxi in May 2018, in a bid to screen the best variety for countrywide promotion. (Xinhua/Li Ziheng)