(1) According to the map, the east-west trunk lines include Longhai Line, Shanghai-Hangzhou Line and Hunan-Guizhou Line, and the north-south trunk lines include Beijing-Guangzhou Line, Beijing-Kowloon Line and Beijing-Shanghai Line.

(2) The Yangtze River is known as the "golden waterway" because of its high shipping value, and the railway transportation along the coasts of Chongqing, Wuhan, Nanjing and Shanghai is very convenient.

(3) The train number from Beijing to Shanghai should be T2 1, where the letter "T" stands for express train.

(4) You can take the highway from Anyang to Zhengzhou, then visit Wuhan University from Beijing-Guangzhou Line to Wuhan, and then visit Nanjing University and Shanghai University along the river, passing through Henan, Hubei, Anhui, Jiangsu, Shanghai and other provinces.

So the answer is:

(1) Beijing-Kowloon Line, Qinghai-Tibet Line, Longhai Line, Beijing-Guangzhou Line and Shanghai-Hangzhou Line;

(2) Nanjing; Inland river;

(3)t 2 1； Express train;

(4) First from Anyang to Zhengzhou, choose highway transportation, then visit Wuhan University from Beijing-Guangzhou line to Wuhan, then visit Nanjing University and Shanghai University along the river, passing through Henan, Hubei, Anhui, Jiangsu, Shanghai and other provinces.