Which is better for surveying and mapping projects to go to China Railway or China Communications?

First: China Railway undertakes large-scale projects, mostly in barren hills, living in board houses or rented farmhouses for several months or even years. No women, no entertainment, only gambling. Boredom is mental torture.

Second: Surveying and mapping is an auxiliary major in China Railway, not a core major, and is not valued.

Third: there are many people in large units, and it is difficult to get ahead without special ability and care.

I suggest you go to urban construction, planning, land and other surveying and mapping units.