How to play Tetris puzzle Luban Lock

1. First, take out 4 wooden strips and stand them opposite each other. Take out 2 wooden strips and place them face up on the bottom gap of the 4 wooden strips.

2. Next, place 2 wooden strips on the left and right sides respectively, put the beads in, buckle the two wooden strips onto 1 wooden strip, insert them at the top, and hold up the lock with your right hand.

3. Finally, pull down the lower left wooden bar to reveal a gap. Place the last wooden bar, the one with the gap, on it and adjust the position. Push back the two protruding wooden bars one by one, and the Luban lock is assembled. If you need to unlock it, the method is the same, just reverse the assembly steps. Luban lock is also known as Kongming lock and Bagua lock among the people.