Line 4
A train of Chongqing Rail Transit Line 4
Overview
Native name	重庆轨道交通4号线
Status	Operational
Locale	Chongqing, China
Termini	Shimahelijiao (Future: Shunshuisi Park)[1] Huangling
Stations	33
Service
Type	Rapid transit
System	Chongqing Rail Transit
Operator(s)	Chongqing Rail Line 4 Construction Operation Co., Ltd.
History
Opened	28 December 2018; 7 years ago (2018-12-28)
Technical
Line length	59.5 km (37.0 miles) (58 km (36 miles) in operation)
Number of tracks	2
Track gauge	1,435 mm (4 ft 8+1⁄2 in)
Electrification	1500 V DC overhead line
Route map Legend Shunshuisi Park Hongfan depot Shimahelijiao Line 21 Yudaishan Loop Loop line Line 21 Panxi Dashiba 5 Daqingcun Huahuiyuan 6 Longxi Jiazhoulu 3 Min'an Ave. Loop Loop line Chongqing N. Station N. Square 10 Line 10 to Lanhualu to Wangjiazhuang Line 9 to Gaotanyan Toutang 9 Baoshuigang 9 Line 9 to Huashigou Cuntan Heishizi Gangcheng Taipingchong Tangjiatuo depot Tangjiatuo Tieshanping Tongluo Mountains CRRC Changchun (Chongqing) Luqi Guoyuan Logistics Hub Yuzui Yanping Shiheqing Fusheng Sanbanxi Longyi Ave. Longxing Gaoshita Pufu Tongzilin Shichuan Huangling Shichuan depot

Line 4 of Chongqing Rail Transit is a rapid transit line in Chongqing, China.^[2]

Since June 2020, some express trains through operate from Line 4 into the Loop line.^[3]

Phase 1 (Min'an Ave. – Tangjiatuo) is 15.754 km (9.789 mi) in length (underground section is 11.075 km (6.882 mi), elevated section is 4.679 km (2.907 mi)).^[4] In June 2018, debugging of the first segment of Phase I commenced.^[6] Phase 1 of Line 4 began operating on December 28, 2018.

Phase 2 (Tangjiatuo – Huangling) is 32.8 km (20.4 mi) in length (21.25 km (13.20 mi) underground and 11.55 km (7.18 mi) elevated^[7]) with 15 stations (10 underground stations and 5 elevated stations).^[8] In 2022, debugging of this segment commenced.^[9] The segment opened on June 18, 2022.^[10]

Western extension (Shunshuisi Park – Jiazhoulu) is 11 km (6.8 mi) in length, all are underground with 9 stations (Shunshuisi Park station is not opened). Construction started on March 2, 2021^[11] and begin operating on 10 February 2026 at 2:00 pm (Shunshuisi Park station is not opened).^[12]

Service routes		Station No.	Station name[9]		Connections	Distance km		Location
E	L		English	Chinese
		/	Shunshuisi Park[1]	顺水寺公园[1][13]				Liangjiang
	●	/	Shimahelijiao[1]	石马河立交[1][13]
	●	/	Yudaishan	玉带山	Loop line
	●	/	Panxi	盘溪
	●	/	Dashiba	大石坝	Line 5
	●	/	Daqingcun	大庆村
	●	/	Huahuiyuan	花卉园	Line 6
	●	/	Longxi	龙溪
	●	/	Jiazhoulu	嘉州路	Line 3
↑		Express trains through service to/from Tiaodeng via Loop line and Line 5.
●	●	/	Min'an Ave.	民安大道	Loop line	-	0.00
●	●	/	Chongqing North Station North Square[a]	重庆北站北广场	Line 10	2.27	2.27
●	●	/	Toutang	头塘	Line 9	2.36	4.63
｜	●	/	Baoshuigang	保税港	Line 9	1.36	5.99
｜	●	/	Cuntan	寸滩		2.59	8.58
｜	●	/	Heishizi	黑石子		1.53	10.11
｜	●	/	Gangcheng	港城		1.29	11.4
｜	●	/	Taipingchong	太平冲		2.13	13.53
●	●	/	Tangjiatuo	唐家沱		1.82	15.35
	●	/	Tieshanping	铁山坪		1.38	16.73
	●	/	Luqi	鹿栖		5.30	22.03
	●	/	Guoyuan Logistics Hub	果园物流枢纽		2.60	24.63
	●	/	Yuzui	鱼嘴		2.73	27.36
	●	/	Yanping	雁坪		1.45	28.81
	●	/	Shiheqing	石河清		2.69	31.50
	●	/	Fusheng	复盛	Fusheng	2.16	33.66
	●	/	Sanbanxi	三板溪		1.32	34.98
	●	/	Longyi Ave.	龙驿大道		2.52	37.50
	●	/	Longxing	龙兴		1.56	39.06
	●	/	Gaoshita	高石塔		1.13	40.19
	●	/	Pufu	普福		1.96	42.15
	●	/	Tongzilin	桐梓林		1.91	44.06
	●	/	Shichuan	石船		2.64	46.70
	●	/	Huangling	黄岭		1.57	48.27

The line is nicknamed the "Basket Line" by some locals, as rural, mostly elderly, residents use the line to bring baskets of vegetables into the city to sell at marketplaces. Some people suggests to ban vegetable baskets on the line, which was rejected by the operator.^[14]