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Photo taken on May 18, 2018 shows the Qiong kiln archeological relic park in Qionglai of Chengdu, southwest China's Sichuan Province. A Qiong kiln archeological relic park opened in Qionglai on Friday. (Xinhua/Jiang Hongjing)

Photo taken on May 18, 2018 shows the Qiong kiln archeological relic park in Qionglai of Chengdu, southwest China's Sichuan Province. A Qiong kiln archeological relic park opened in Qionglai on Friday. (Xinhua/Jiang Hongjing)