User:Johnson.Xia/BGR

zh:京广既有线动车组列车D-series trains on conventional Beijing-Guangzhou Railway, carried out by electric multiple unit, have been operated by former Ministry of Railways in China (hereinafter referred to as MOR) from April 18th, 2007 during the Sixth China Railway "Speed Up Campaign" to December 21st, 2012, 5 days before the debut of the Beijing–Guangzhou high-speed railway. Restricted by the passing trains through Wuhan Yangtze River Bridge and their speed limit, these trains could be separated by Yangtze River; most of which ran between Beijing and Hankou, Wuhan, while some of which ran between Wuchang, Wuhan and Changsha or between Changsha and Zhuzhou. Later on, there were services serving as far as Taiyuan and Xi'an.

Background
Early in 1997, MOR initiated projects to upgrade Beijing-Guangzhou Railway (hereinafter referred to as BGR) and finished electrification and implementation of continuous welded rail. In 2003, to carry out the Fifth "Speed Up Campaign" (executed in 2004), MOR decided to raise the speed up to 200 km/h for several trunk lines, including BGR. In 2005, to achieve the Sixth "Speed Up Campaign", MOR started the 4th plan to refine BGR, transforming overhead line, distances between trucks, and junctions. Moreover, MOR installed Chinese Train Control System Level 2 and further distributed along the railway in 2006.

Debut
The Sixth "Speed Up Campaign" started on April 18th, 2007, making several D-series trains (, [ zh], train services provided by bullet trains running up to 200 km/h) in service on upgraded conventional railways. Among them, the first pair of bullet trains between Beijing and Wuhan began their operation when train D123 departed from Beijing West railway station at 9:47 and when train D122 departed from Hankou railway station at 11:05; later that day, D123 arrived Wuhan at 18:30, and train D122 arrived Beijing West at 19:27.

Ending and Transformation
On December 21st, 2012, all bullet trains on conventional Beijing-Guangzhou Railway ceased operation; 5 days later, when Beijing–Guangzhou high-speed railway fully came into use, bullet trains reemerged as G-series trains running between Beijing and Wuhan [ zh] and between Beijing and Zhengzhou [ zh] on the new-built high-speed railway.

Aftermath
Some bullet trains on BGR kept operating after 2012.