Xi'an–Chengdu high-speed railway or Xi'an-Chengdu Passenger Dedicated Line, is a dual-track,

electrified Electrification is the process of powering by electricity and, in many contexts, the introduction of such power by changing over from an earlier power source. The broad meaning of the term, such as in the history of technology, economic history ...

, high-speed rail line in

Western China Western China (, or rarely ) is the west of China. In the definition of the Chinese government, Western China covers one municipality ( Chongqing), six provinces (Sichuan, Guizhou, Yunnan, Shaanxi, Gansu, and Qinghai), and three autonomou ...

between

Xi'an Xi'an ( , ; ; Chinese: ), frequently spelled as Xian and also known by other names, is the capital of Shaanxi Province. A sub-provincial city on the Guanzhong Plain, the city is the third most populous city in Western China, after Chongqi ...

and

Chengdu Chengdu (, ; simplified Chinese: 成都; pinyin: ''Chéngdū''; Sichuanese pronunciation: , Standard Chinese pronunciation: ), alternatively romanized as Chengtu, is a sub-provincial city which serves as the capital of the Chinese provin ...

, respectively the provincial capitals of

Shaanxi Shaanxi (alternatively Shensi, see § Name) is a landlocked province of China. Officially part of Northwest China, it borders the province-level divisions of Shanxi (NE, E), Henan (E), Hubei (SE), Chongqing (S), Sichuan (SW), Gansu (W), N ...

and

Sichuan Sichuan (; zh, c=, labels=no, ; zh, p=Sìchuān; alternatively romanized as Szechuan or Szechwan; formerly also referred to as "West China" or "Western China" by Protestant missions) is a province in Southwest China occupying most of t ...

. This line, which commenced operations on 6 December 2017, runs through Shaanxi and Sichuan provinces and accommodates trains traveling at speeds up to . Travel time between the two provincial capitals was reduced from 16 to less than three hours. The project was approved by the

State Development and Planning Commission The National Development and Reform Commission of the People's Republic of China (NDRC), formerly State Planning Commission and State Development Planning Commission, is a macroeconomic management agency under the State Council, which has b ...

in October 2010. Construction of the Sichuan section of the railway started on November 10, 2010, and of the Shaanxi section, on October 27, 2012. The line traverses the rugged Qin and

Daba Mountains The Daba Mountains, also known by their Chinese name as the Dabashan, are a mountain range in Central China between the watersheds of the Yellow and Yangtze Rivers. Part of the larger Qinling mountain range, it cuts through four provinces: Si ...

and connects the Guanzhong Plains with the

Sichuan Basin The Sichuan Basin (), formerly transliterated as the Szechwan Basin, sometimes called the Red Basin, is a lowland region in southwestern China. It is surrounded by mountains on all sides and is drained by the upper Yangtze River and its tributar ...

. The line is part of the Beijing–Kunming corridor.

Route

The high-speed rail line connects Xian, in the

Wei River The Wei River () is a major river in west-central China's Gansu and Shaanxi provinces. It is the largest tributary of the Yellow River and very important in the early development of Chinese civilization. The source of the Wei River is close to ...

Valley,

Hanzhong Hanzhong (; abbreviation: Han) is a prefecture-level city in the southwest of Shaanxi province, China, bordering the provinces of Sichuan to the south and Gansu to the west. The founder of the Han dynasty, Liu Bang, was once enfeoffed as ...

, in the Han River Valley, and

Guangyuan Guangyuan () is a prefecture-level city in Sichuan Province, China, bordering the provinces of Shaanxi to the northeast and Gansu to the northwest. The city has a population of 2,305,657 as of the 2020 census. Located roughly between the provin ...

Jiangyou Jiangyou () is a Chinese county-level city located in Mianyang, Sichuan. The city proper is subdivided into four urban districts and has jurisdiction over 21 towns, and 19 rural townships. It is the hometown of Li Bai, a leading Tang Dynasty po ...

and

in the Sichuan Basin. In the Qin Mountains, it has of tunnels, including six over in length. The railway passes under ecologically sensitive areas including the Taibaishan and Hanzhong Crested Ibis National Nature Reserves, which are home to the

endangered An endangered species is a species that is very likely to become extinct in the near future, either worldwide or in a particular political jurisdiction. Endangered species may be at risk due to factors such as habitat loss, poaching and in ...

giant panda The giant panda (''Ailuropoda melanoleuca''), also known as the panda bear (or simply the panda), is a bear species endemic to China. It is characterised by its bold black-and-white coat and rotund body. The name "giant panda" is sometimes u ...

golden snub-nosed monkey The golden snub-nosed monkey (''Rhinopithecus roxellana'') is an Old World monkey in the subfamily Colobinae. It is endemic to a small area in temperate, mountainous forests of central and Southwest China. They inhabit these mountainous fores ...

takin The takin (''Budorcas taxicolor''; ), also called cattle chamois or gnu goat, is a large species of ungulate of the subfamily Caprinae found in the eastern Himalayas. It includes four subspecies: the Mishmi takin (''B. t. taxicolor''), the g ...

and

crested ibis The crested ibis (''Nipponia nippon''), also known as the Japanese crested ibis, Asian crested ibis or toki, is a large (up to long), white-plumaged ibis of pine forests, native to eastern Asia. Its head is partially bare, showing red skin, and ...

. Over much of its length, the Xi'an–Chengdu Passenger Dedicated Line largely parallels existing railways: the Yangpingguan–Ankang railway in southwestern Shaanxi (between Hanzhong and the Yangpingguan junction), and the Baoji–Chengdu railway in Sichuan (from Yangpingguan to Chengdu). However, the section from Xi'an to Hanzhong, crossing in tunnels under the Qin Mountains, follows an entirely new direct route. High speed rail reforms meant direct Chengdu-Lanzhou and Chongqing-Xi'an services would use a combination of Xi'an–Chengdu high-speed railway and Chongqing–Lanzhou railway from where they met at

. This would negate the need to build a separate direct Chongqing-Xi'an or Chengdu-Lanzhou lines. However, with the announcement of the expanded 8+8 high speed rail grid, the two originally planned lines were reinstated in the masterplan. The Chengdu-Xi'an HSR have to cross the Qin Mountains; to achieve that, trains must climb continuously at 2.5% inclination (2.5 meters up per 100 meters run) for 47 kilometers. Since most HSR trains with 250 km/h maximum speed are not equipped with sufficient redundant power to maintain max speed climbing, trains scheduled to run between Chengdu and Xi'an using 250 km/h max speed equipments have to reserve extra time for the tunnel. However, for trains that continue to Beijing via Xi'an-Zhengzhou High Speed Rail and Guangzhou-Beijing High Speed Rail, an equipment capable of 350 km/h operations must be utilized to reach regular speed on the Zhengzhou-Beijing part. With redundant power equipped for 350 km/h operations, they lose less speed going up the tunnel, thus spending less time; this has reportedly caused these trains to have to reduce speed to maintain proper separation.

History

* Nov. 1, 2010: The Xi'an–Chengdu high-speed railway project received approval from the

."China plans high-speed rail link for Chengdu-Xi'an" ''A.P.''
2010-11-02

Notes

{{DEFAULTSORT:Xi'an-Chengdu High-Speed Railway High-speed railway lines in China Rail transport in Shaanxi Rail transport in Sichuan