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By Thursday, only 15 square kilometers of farmland in the Mengwa area had emerged from the water.

By 2021, Zhangjiakou will put into use about 3,000 such vehicles and 31 hydrogen refueling stations, while the annual hydrogen output will reach 21,000 tons, according to the plan.

By 2020, globally, Chinese visitors are expected to go on 1 billion sports-themed trips annually, accounting for 15 percent of the total number of trips. The total consumption scale is expected to reach 1 trillion yuan, according to a forecast by China's Ministry of Culture and Tourism.

But, like in any other sunrise industry, challenges abound. Many young consumers remain indifferent or skeptical. For instance, Zhou Li, 30, a university teacher from Hefei, Anhui province, has never used online dating apps. Hers is a "wait-and-watch" attitude.

By July 21, Chongqing municipality, Shaanxi, Sichuan, Yunnan, Guizhou, Gansu and Qinghai provinces－as well as the Guangxi Zhuang, Ningxia Hui, Tibet, Xinjiang Uygur and Inner Mongolia autonomous regions－had announced their economic data for the first half. Only Shaanxi and Inner Mongolia reported negative growth.