Chinese catapult has affected military weapons and techniques in Western countries. Here is one of the examples of the catapult variant. In this catapult, a spoon-shaped lever is linked with a twisted rope and components. When a soldier pulls the twisted rope and releases it immediately, the torque force will be produced and focus on the main pole. Then the projectile will be shot to the enemy, large rocks were usually chosen as the projectile. Some experts claimed that cherrywood was a common ingredient of the main pole due to its good resilience. This type of catapult was usually installed on a wheeled platform in order to move conveniently.