Introduction to the moat: The "moat" is an important scene in the famous film "Five Leaders", which won the Grand Prize at the Rotterdam Film Festival in the Netherlands. Enter the "moat"! It is just a small ditch no more than ten meters long and five or six meters wide, but under the special lens of the film artist, it can be turned into a "moat" that can block thousands of troops, which is enough to show the art of film of excellence.