adreses of both train station( Zhengzhou and Xi,an)

You had better take a G train from Zhengzhou to Xian, which will take you around 3 hrs. The adress of these 2 trains are as follows:
Zhengzhou Railway station is on the Datong Road. It is located near Erma Lu in Erqi District is at the junction of Longhai (Gansu–Lianyungang) Railway and Jingjiu (Beijing–Kowloon) Railway.
Xian North Railway Station is located at the joint area of the 3rd Ring Road, axis road of northern Xian and the city's loop expressway.