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Photo taken on July 11, 2019 shows the site of Ombilin Town in Sawahlunto, West Sumatra, Indonesia. The Ombilin Coal Mining Heritage, built in the1890s, was listed as the world heritage of UNESCO on July 6, 2019. (Xinhua/Du Yu)
Photo taken on July 11, 2019 shows the site of Ombilin Town in Sawahlunto, West Sumatra, Indonesia. The Ombilin Coal Mining Heritage, built in the1890s, was listed as the world heritage of UNESCO on July 6, 2019. (Xinhua/Du Yu)