Traditional Culture Encyclopedia - Traditional festivals - How do people live in this forest?

How do people live in this forest?

The Iceman first moves the yellow switch to let the firemen and Iceman go down. Then the fireman jumped over the board (a little difficult, but ok) and pressed the white switch, and the Iceman opened the door. The iceman walked in and pressed the blue switch. The iceman walked over and the fireman came down. This is the pass. (That's how my brother and I got there)