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Tourists visit the Longmen Grottoes in Luoyang City, central China's Henan Province, Feb. 8, 2019. China's domestic tourism revenue gained 513.9 billion yuan (about 76.21 billion U.S. dollars) during the week-long Spring Festival holiday that ends Sunday, an annual increase of 8.2 percent, according to the Ministry of Culture and Tourism. (Xinhua/Li An)