② Liangliang's route to Lingling's house is:

First, walk 400 meters to the school at No.22 in the northeast, and then walk 400 meters to Lingling's home at No.50 in the southeast of the school.

Therefore, the answer is: (1) 30,600 meters west and south; (2) First, walk 400 meters to the school at No.22 in the northeast, and then walk 400 meters from the school to Lingling's home at No.50 in the southeast. ..