What are the naming rules of China railway trains?

The Qinghai-Tibet Railway was put into operation on July 1st. As we all know, Qinghai-Tibet refers to Qinghai and Tibet, and the starting and ending points of the Qinghai-Tibet Railway are precisely Xining City in Qinghai Province and Lhasa City in Xizang Autonomous Region. Then, why don't you call it the west cable as usual? It is really difficult to answer this question, because there is no unified standard for the naming of railway lines in China, and there are many ways, which are roughly as follows: 1. Take one word for the names of the two provinces where the starting and ending points are located. This way is rare and belongs to the established name, as is the case with the Qinghai-Tibet Railway. 2. Take one word for the short names of the two provinces where the starting and ending points are located. This way is relatively many, basically some railways built before the founding of New China, such as Zhejiang-Jiangxi Line, Hunan-Guizhou Line, Anhui-Jiangxi Line, etc. Zhejiang is the abbreviation of Zhejiang, Guizhou is the abbreviation of Guizhou, and Anhui is the abbreviation of Anhui. 3. Named after the name of the city and the name of the province where the starting and ending points are located, this method is also relatively rare, such as Lanxin Line and Lanqing Line. Lan refers to Lanzhou, Xin refers to Xinjiang and Qing refers to Qinghai. 4. Named after the names of the two cities where the starting and ending points are located, this method is basically the current naming convention, which is easy to understand, such as Beijing-Guangzhou Line, Beijing-Baotou Line and Beijing-Harbin Line. Beijing is Beijing, Baotou is Baotou, and Harbin is Harbin. However, apart from Harbin's Harbin character, the Jingha line generally takes the Bin character, such as Binzhou line, Labin line, Changbin line and Binsui line. 5. Take the name of the city where the starting and ending points are located and the abbreviation of the city name, such as Beijing-Shanghai Line, Yuhuai Line, Ningxi Line and Nanxun Line. Shanghai is the abbreviation of Shanghai, Chongqing is the abbreviation of Chongqing, Ning is the abbreviation of Nanjing, and Xunjiu is the abbreviation of Jiujiang. The reason why they are named like this is that some of them are established by convention, and some may be for the convenience of distinction. There are too many similar city names in China, such as Nanjing. Taking Nanzi will be confused with Nanchang and Nanning, and taking Beijing is even more difficult to distinguish from Beijing. Replacing Nanjing with Ning for short can avoid these problems, but those who don't know Nanjing for short may not understand. 6. Take one word for each short name of the two cities where the starting and ending points are located, such as Shanghai-Nanjing Line. 7. Named after the name of the city and the place where the starting and ending points are located, such as the Jinpu Line. Tianjin refers to Tianjin, and Pukou refers to Pukou, which is only a district of Nanjing. At that time, it was not called the Jinning Line because Pukou and Nanjing were separated by the Yangtze River Graben and there was no bridge connected. However, if we name it now, we will definitely follow the principle of taking the big and not taking the small, and call it the Jinning Line. For example, Jingtong Line, the connecting point is actually in Changping, but Changping has a small place name and belongs to Beijing, so it is named Jingtong Line. There are quite a few cases, such as Baozhong Line and Xikang Line. 8. Named after a place name, it is usually a short branch line, such as Linyi North Line, Chengdu West Line, Wangtou Line, Beilun Line, Hegang Line and Shaoshan Line. 9. Named after a certain area, such as the southern Xinjiang line and the northern Xinjiang line. Needless to say, the various naming methods of railway lines have brought people a lot of inconvenience, at least it is difficult to master. In particular, some old place names are no longer in use or have changed their names, but the names of railway lines have been passed down, and people who don't understand the historical evolution and the evolution of place names must be puzzled. The most typical example is the Longhai Railway from Lanzhou, Gansu to Lianyungang, Jiangsu. Why is it called Longhai Railway? It's a long story After Qin Shihuang unified China, the whole country was divided into 36 counties, and now the southeast of Gansu Province is Beidi County and Longxi County among the 36 counties. It was not until the Yuan Dynasty that Gansu was established as a book province, and a Gansu name appeared. Therefore, Gansu in the old days was referred to as Long for short. The sea of Longhai refers to Haizhou, which is now a district of Lianyungang City. However, before 1961, there was no Lianyungang, which was called Xinhailian City at that time. It was named after the composition of Xinpu, Haizhou and Lianyun. It originally belonged to Shandong Province, and the railway was built in sections from east to west, from Haizhou to Lanzhou in the east. It was not completed until 1953, so it was logical to name it Longhai Railway at that time. After careful analysis, of these nine naming methods, the fourth one is the most scientific and simple. When building a new railway line, we should be cautious about the name of the railway line, which should be scientific, standardized and clear at a glance.