Everybody help us come in and see what kind of weapon this is. 50 points!

There are the following titles. In China, it's traditionally called "Woods mandarin duck monster", also known as rotating stick, T-monster and T-monster. It is widely used in police forces in various countries, and Japanese karate is also one of the training programs. This weapon can be attacked and defended, and has the functions of short stick and capture. Except for military police, most of them are crutches. It is rare in China Wulin now, and it is a unique weapon.