A train runs through cole flower fields in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A child views scenery through the window of a steam train in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

Tourists take a steam train in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A train runs through cole flower fields in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A train runs on a narrow gauge railway in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A train runs through cole flower fields in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A train runs on a narrow gauge railway in cole flower fields in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]

A train runs through cole flower fields in Qianwei County, southwest China's Sichuan Province, March 2, 2021. The old-fashioned steam train, running on a narrow gauge railway in Qianwei County, serves mainly in sightseeing. As increasing number of tourists visit the county in recent years, the train itself has become an attraction providing a journey of reminiscence. [Photo/Xinhua]