[2] When the line opened on August 1, 2008, it set the record for the fastest conventional train service in the world by top speed, and reduced travel time between the two largest cities in northern China from 70 to 30 minutes.

From Beijing South railway station, the line runs in a southeasterly direction, following the Beijing–Tianjin–Tanggu Expressway to Tianjin.

As an intercity line, it will provide train service only between the two metropolitan areas, unlike the Beijing–Shanghai High-Speed Railway which will continue beyond Shanghai.

The line opened on August 1, 2008, with 47 daily pairs of intercity trains between Beijing South and Tianjin.

Frequencies have consistently been increased since to cope with rising demand, reaching 136 pairs of trains operating daily by 2018.

[citation needed] From June 12, 2011, online railroad ticketing was first tested on the Beijing-Tianjin Intercity Railway.

[citation needed] On February 6, 2017, the mayor of Tianjin, Wang Dongfeng, said at the symposium of the central media's "Beijing-Tianjin-Hebei Cooperative Development Research Line" interview group that the Beijing–Tianjin intercity railway is expected to implement a monthly ticket system, and from May 1, 2017, in order to facilitate the travel of commuters between Beijing and Tianjin, China Railway Yin Tong Payment Co. "China Railway Beijing-Tianjin Intercity City Discount Card" for frequent commuters of the Beijing-Tianjin Intercity Railway, who can enjoy certain discounts for a certain number of purchases.

Each kilometer of bridge can save 30,000 square meters (320,000 sq ft) of land compared with the traditional roadbed.

The railroad track uses the advanced welding process of long steel rails, and the comprehensive inspection shows that the line quality is stable.

Traction power supply When a high-speed train runs at a speed of 350 kilometers per hour (220 mph), that is, nearly 100 meters per second, there are high requirements for the stability of the current receiving between the catenary and the pantograph, as well as the power supply equipment for electrified railways.

The Beijing–Tianjin intercity railway adopts SCADA system for remote monitoring, and for the first time in China adopts a magnesium-copper alloy, small cross-section (120 mm (4.7 in)), high tension, lightweight simple chain-type belt reinforced wire suspension catenary system.

In June 2003, the Ministry of Railways and the municipal governments of Beijing and Tianjin began preliminary discussions.

The entire Beijing-Tianjin intercity rail transit system construction project adopts the "two points and one line" construction strategy, which is divided into three parts: the Beijing–Tianjin intercity railway, Beijing South Railway Station, and Tianjin Station transportation hub reconstruction project, which are carried out simultaneously.

On December 19, 2007, the construction of the electrified catenary under the charge of the China Railway Electrification Bureau was in full swing.

On July 1, 2008, the Beijing-Tianjin Intercity Railway began trial operation without carrying passengers according to the official operating conditions to verify the tracking interval of trains, the interval between trains receiving and departing at stations, etc., and at the same time arrange simulated equipment failures and emergency response in bad weather drill.

[citation needed] The Beijing-Tianjin Intercity Railway was officially opened to traffic on August 1, 2008, with Vice Premier Zhang Dejiang, Beijing Municipal Party Secretary Liu Qi and Tianjin Municipal Party Secretary Zhang Gaoli attending the opening ceremony.

[citation needed] On October 1, 2009, construction of the Beijing-Tianjin Intercity Extension, or Jinbin Intercity Railway, began, with an estimated 40+ minutes from Beijing South Station to Binhai Station in the core area of Binhai New Area.

The Yujiapu extension opened on September 20, 2015, and the Beijing-Tianjin intercity train no longer travels the Jinshan Railway when running between the central city of Tianjin and the core area of the Binhai New Area, and the running time has been significantly shortened.

[14] The line has a capacity of delivering 100 million rides annually[15] and initial estimated repayment period of 16 years.

[14] As of 2012, Beijing–Tianjin Intercity Railway officially reported to break even financially, defined as operational costs with debt payments is matched with revenue.

The Beijing-Shanghai high-speed railway Beijing-Tianjin intercity liaison line Nan Cang Special Bridge project starts at the Pu Ji He Dao overpass and extends to the east of Tianjin West Station in a southwesterly direction, with a total length of 4.38 km.

The liaison line has been basically completed and will be ready for operation after the construction of the intercity field at Tianjin West Station.