Tie Mu Xin did not know Xiahou Ying's true identity. He thought that anyone standing against Li Mu Yang was a bad person who wanted to harm him.
When he came in, he happened to see Li Mu Yang wounded in the chest, while Xiahou Ying was raising his giant bow and aiming in Li Mu Yang's direction. So his first reaction was that Xiahou Ying was no good.
He never expected that a single sentence from him would completely offend Starry Sky Master Xiahou Qianbai.
Tie Mu Xin had called Xiahou Ying a "grandson," so what did that make Xiahou Ying's son and Tie Mu Xin?
Besides, Xiahou Qianbai knew that Tie Mu Xin was a student of Starry Sky Academy. For a student of Starry Sky Academy to insult a teacher and elder, that was an even greater offense.
Thus, Xiahou Qianbai had given him a lesson without the slightest hesitation.
Tie Mu Xin crawled up from the ground, rubbed his aching head, and asked with a baffled look, "Master Xiahou, how could you strike someone?"
"Don't you know what you did wrong?"
"I don't."
"—You blocked my view." Xiahou Qianbai was also unwilling to explain his true relationship with Xiahou Ying to others. Those who knew would know, and those who did not simply did not.
After all, father and son fighting to the death was hardly something glorious.
"Oh—" Tie Mu Xin suddenly understood. He climbed to his feet and ran back to Li Mu Yang's side. This time, however, he had learned his lesson. He did not dare stand in front of Xiahou Qianbai again. Instead, he ran to Xiahou Qianbai's side, pointed at Xiahou Ying, and was about to start cursing again.
Li Mu Yang hurriedly reached out and grabbed him, asking, "Why have