Un-cocked state： the trigger is portable along the guide.
#16 is the cocking bar , when it moves backward, the bolt is feed up, at the same time the bow begins to store energy.
The bolts are placed in a horizontal line, a heavy object is used to pull the bolt into the feeding slot.
The bolt firing mechanism is very suprising and low energy efficency.
It uses a hard stick (#5) to hit the end of bolt, then the bolt get only a little energy.
x-bow trigger below is fixed in the body.
Here is the news link of this repeating x-bow。