I assume you mean upper back when you say 背部. Some of my personal
favorites for back development:
1) Pull-ups - the king of the back width
2) Deadlift - the king of the back builders
3) One-arm dumbbell row
4) Snatch grip stiff-legged deadlift
5) Pendlay rows
6) Front squat
7) Barbell/dumbbell shrugs (for traps)