The library is in the northeast of the Children's Palace.

There are six lines in the 3 * * * direction.

East → North:

1, east → (any northbound road must be on the west side of the Children's Palace → any eastbound road must be on the south side of the Children's Palace) The line in brackets can be found eastward or northward according to the distance to the Children's Palace → Children's Palace → (any northbound road must be on the west side of the library → any eastbound road must be on the south side of the library).

2. East → Children's Palace → (any northbound road must be on the west side of the library → any eastbound road must be on the south side of the library) The line in brackets can find the direction of east or north according to the distance to the library → the library.

3. East → Children's Palace → Library

North → East:

Tongli East → North Line 3

Theoretically, there can be countless lines. In reality, the road is not complicated.