Chickens for sale are seen on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A woman of Yi ethnic group (R) sells goods at a mobile market on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A student takes the 5633 train to school in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Students take the 5633 train to school in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A student takes the 5633 train back to school in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Children take the 5633 train to school in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Students take the 5633 train to school in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A woman of Yi ethnic group makes an insole on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A woman of Yi ethnic group arranges her goods purchased from Xichang City on the 5634 train in southwest China's Sichuan Province, April 12, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Peddlers of Yi ethnic group unload their goods from the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A woman of Yi ethnic group carries fresh cherries for sale on the 5634 train in southwest China's Sichuan Province, April 12, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A piglet is seen on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

An elderly woman takes cherries to Xichang City for sale on a slow-speed train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Driver of the 5633/5634 train Zhao Wei prepares to set out in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A woman of Yi ethnic group selects vegetable at a mobile market on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

A passenger shows her ticket on the 5634 train in southwest China's Sichuan Province, April 12, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)

Passengers are seen on the 5633 train in southwest China's Sichuan Province, April 11, 2021. As modern high-speed trains shoot past new stations throughout China, a pair of slow-speed trains still run through Daliang Mountains. The 5633/5634 trains run between Puxiong and Panzhihua of Sichuan Province with an average speed less than 40 km per hour. The journey with 26 stations in between takes eleven hours and four minutes, with the ticket prices ranging from 2 yuan to 25.5 yuan(about 0.3-3.9 U.S. dollars). The slow-speed trains send children to their schools, sick people to healthcare, and the locals to the world outside of the mountains. (Photo: Xinhua)