How many strands of rubber bands are the most powerful in sliding bow?

According to the contents of China's standard documents for the identification of control instruments, the sliding bow belongs to the heavy bow, with the initial use of more than 9MM, and the eight-strand rubber band is the most powerful.

Sliding chamber bow, also known as crossbow, is a weapon improved from traditional bow and arrow. It is powered by air pressure or mechanical force and has the characteristics of high speed and continuous firing, so it is often regarded as a dangerous weapon to be controlled.