Invincible Instructor of Special Forces

I accidentally traveled to the world of special forces, only to find that I was in prison... But why do these people respect me so much and ask me to be their instructor? "Really or not, someone like me can be an instructor?" Xiang Chu, who has the system, said don't panic, it's not a big problem! This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.