12 What are the Luban locks?

Straight rod luban lock, u-shaped luban lock, eight-character luban lock, long luban lock.

1, straight rod luban lock: It is composed of 12 straight rods with the same length, which is less difficult and suitable for beginners to practice.

2. It is composed of 12 bent U-shaped parts, which is moderately difficult and requires some intelligence and patience.

3. It is composed of 12 bending parts, and it is shaped like a figure of eight. It is difficult and requires high intelligence and operational skills.

4. It is composed of 12, which is dragon-shaped, difficult and requires high intelligence and operational skills.