Baoji–Chengdu railway

[13][14] The Bao–Cheng Line runs southwards from Guanzhong Plain to Sichuan Basin and traverses the Qinling, Daba Mountains, and Jianmen after leaving Baoji.

[15] The rail line goes through 5 different zones of geological structures (including granite, quartzite, greenschist, conglomerate and slate);[16] around 80% are in the mountainous area.

[1] A spiral by 3 horseshoe-shaped tracks and a figure-8 one, which is stacked in 3 layers and raised up to 817 meters, allows the rail line to navigate topological difficulties.

[30] Later, the opening of the Xi'an–Chengdu Highspeed Railway on 6 December 2017 made the number of passenger trains on the line beginning at Baoji decrease to roughly 20.

[3] At Yangpingguan, the line intersects with the Yang'an railway which branches eastward along the Han River Valley.

[19]: 795 The PRC Ministry of Railways (MOR) managed to conduct further surveys for the Tianshui–Lüeyang section of the 1920 scheme along with a brand-new Baoji–Lüeyang one with the assistance of experts from Soviet Union, after which the new one was selected following comparisons of the geological and transportation network conditions with the former one.

[39] The construction throughout Sichuan then began in 1953; track-laying work started from south to north at the Chengdu end in April.

[40] The line got renamed to the Baoji–Chengdu Railway on 1 December 1952,[5]: 1307  and construction in Shaanxi Province started from Baoji in January 1954.

[41] The line was connected on 12 July 1956 in Huangshahe Village of Huixian County, Longnan,[35]: 26  13 months ahead of schedule,[19]: 795  and opened on 1 January 1958.

[3] The MOR initially set the catenary to 3 kV DC and submitted the plan to the Soviet counterparts for evaluations in June 1955,[44] but in April 1957, it was determined that single-phase electric power of 25 kV with utility frequency should be employed after learning that other countries had been using this upgraded style.

[45] Engineers decided to reduce the demanded amount of transformers from six to four for substations due to lack of key ingredients for silicon steel and high prices for imports resulting from technological denials from the Western countries.

Substations were gradually replaced by SCADA for smart and automatic controls to ensure continuous and abundant electricity.

[26] In 2021, the Sichuan government issued a plan regarding the provincial multi-layer rail transit system and mentioned that a total length of 24.1 kilometers, as well as 10 stations on the Baoji–Chengdu Railway, would be transformed to fit for a metro-styled operation, with trains traveling with smaller coaches but shorter intervals.

The temporary operations also made the line critical for goods and passengers to leave and enter Sichuan Basin in June 1956 when service of roadways had been dropped due to the 19-day storm season.

The 1957 urgent food transmission from Sichuan, which was called by the State Council, also involved the Bao–Cheng Line by delivering 800 thousand tons of grains.

[35]: 27 Baoji–Chengdu Railway was assessed as a "qualified and good project" after the National Acceptance Committee's check during the stage of temporary operations.

The committee also noted that the line featured a short duration of construction, low costs, high rate of handing over fixed assets, and a quick comeback for the previous investments.

He Long, Nie Rongzhen, Kang Sheng, Teng Daiyuan, Huang Kecheng, and other political figures in mainland China, along with the vice minister of Union of Burma, attended the ceremony, while Radio Moscow and major radio broadcasts in China conducted interviews and reports that day.

[25] A ribbon cutting happened at 3 p.m.,[58] after which an express train left Chengdu for Beijing at 4 p.m., thus marking the opening of the Bao–Cheng Railway.

[43] Two fugitives wanted for homicide fled from Guangxi on 10 May 1987 and hijacked a taxi in Baoji to enter Guanyinshan railway station on 20 May.

Public Security Bureau in Shaanxi made immediate urgent plans after receiving the call of help and asked for assistance from counterparts in Sichuan and Gansu.

At the time, the economy was not strong enough to secure the standard of technologies applied for railway constructions due to lack of facilities.

[64] In 1982, China Railway Xi'an Group determined that the rail line's route should be changed near Lingguanxia due to the subgrade sink caused by the mountain shifts.

[67] In the afternoon of 19 August 2010, a bridge of the railway in Guanghan was brought down by floods, causing two coaches of a train fell into the river.

[73] The Baoji–Chengdu railway succeeded in cultivating talents regarding the design, construction, and manufacturing of electric locomotives and railroads due to its role as the first electrified railway line in China; ultimately, the rail line pushed forward domestic education regarding electrical engineering.

[77] Xujiaping, a town in Lüeyang County, cooperated with China Railway Xi'an Group[78] to transform the ruins of tunnels and railroads into cultural zones.

Crowds at Qinling railway station on vacation days
Freight trains going southward on Baoji–Chengdu railway
Huixian railway station surrounded by the Jialing River together with the Qin Mountains
The SS40855 locomotive fell down from the ruins of a bridge on the line during the 17 July 2024 flood
The monument of Baoji–Chengdu Railway's connection and the red-flag-shaped statue nearby