Steam train passes by Liangshuituo station in Leshan, China's Sichuan

A rainbow appears in the water mist of a steam train passing by Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province, April 9, 2023. (Xinhua/Jiang Hongjing)

This aerial photo taken on April 9, 2023 shows a rainbow appearing in the water mist of a steam train passing by Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

A rainbow appears in the water mist of a steam train passing by Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province, April 9, 2023. (Xinhua/Jiang Hongjing)

A steam train passes by Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province, April 9, 2023. (Xinhua/Jiang Hongjing)

This aerial photo taken on April 9, 2023 shows a steam train passing by Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)

This aerial photo taken on April 9, 2023 shows tourists having fun around Liangshuituo station in Jianwei County, Leshan City, southwest China's Sichuan Province. (Xinhua/Jiang Hongjing)