Why doesn't the z257 train from Hangzhou to Chongqing have a hard seat but only a sleeper?

This train is a full range of sleeper cars, with hard sleeper and soft sleeper. With the latest 25T car and new bogie, the maximum speed can reach 160 km/h, and the operation is more stable.

Hangzhou is located in the east of China, the lower reaches of Qiantang River, the southeast coast, the north of Zhejiang, and the southern end of Beijing-Hangzhou Grand Canal. It is the core city of Greater Bay Area around Hangzhou Bay, the central city of G60 Science and Technology Corridor in Shanghai, Jiaxing and Hangzhou, and an important international e-commerce center. There are many cultural relics in Hangzhou, and there are many natural and cultural landscape relics in and around the West Lake. Representative ones are West Lake Culture, Liangzhu Culture, Silk Culture and Tea Culture.

Location context

Hangzhou is located in the south wing of China Yangtze River Delta, the west end of Hangzhou Bay, the lower reaches of Qiantang River and the southern end of Beijing-Hangzhou Grand Canal. It is an important central city in the Yangtze River Delta and a transportation hub in the southeast of China. Total area 16850 km2.

The geographical coordinates of Hangzhou are11821'-kloc-0/2030' and 291'-3033' north latitude. The geographic coordinates of the city center are 120 12' east longitude and 30 16' north latitude. The city origin (zero kilometer sign) is located at the coordinate origin of Weizi Garden in Shangcheng District. The coordinate origin of Weizi Garden is the center of Hangzhou from 19 13. Buildings, roads, water systems and places of interest in a city can all indicate their orientation and distance from the origin.