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1·Note:Electrifiied railways includes the scope of Lanzhou Railways Bureau since 1995.

注：自1995年起，电气化里程为兰州铁路局全路局数。

2·From 2005, data of railways were re-approved by Lanzhou Railway Bureau.

2005年起铁路数据由兰州铁路局重新核定划分。

3·Note: Length of Railways in Operation is data of Harbin Railway Bureau in churchyard of Heilongjiang Province.

注：铁路里程为哈尔滨铁路局在黑龙江省境内数据。