Teacher Gao and Superintendent Ouyang were two characters in " Battle Through the Heavens." Gao laoshi was Xiao Yan's teacher. He was a mysterious strong person who was once a practitioner. However, due to certain reasons, he gave up on training and became an ordinary teacher. Ou Yang was a powerful martial artist and Xiao Yan's good friend and companion. He had once participated in various battles with Xiao Yan and helped him overcome many difficulties.