Between the South China Sea and the North Iron Mountain, the mountains are beautiful.

"Lock throat gun, the king of guns, lock throat gun is the most difficult to prevent."

According to the headline news "South China Sea, North Tieshan, beautiful scenery; The throat lock gun, the king of guns, is the most difficult to prevent the gun from locking the throat; The sea is vast, and the iron mountain is not a peak. "This passage comes from the classic TV series" Go to Tiger Mountain Again ",which refers to the two protagonists in the play.