It’s because Cui Mingshi wanted to kill Tie Xinshi.

Cui Mingshi is a associate of the Qiu family. The Qiao family and the Qiu family are enemies. Although the conflict later turned into friendship, Cui Mingshi has been instigating the relationship between the two families and dissatisfied with Qiao Zhiyong. The reason is that Qiao Zhiyong let the officers and soldiers After catching his brother Cui Mingjiu, Cui Mingshi always held a grudge.

Cui Mingshi had an insidious character and committed many evil deeds, and was eventually killed by Tie Xinshi. This was clearly informed in episode 39. In episode 39, Qiao Zhiyong exposed Sun Maocai's conspiracy and kicked him out of the Qiao family. Sun Maocai wanted to join Da Shengchang, but Cui Mingshi turned against him and humiliated him. Sun Maocai had no choice but to leave.

Several attempts failed to harm Qiao Zhiyong. Cui Mingshi used the last resort. He made an appointment with Tie Xinshi and coerced him to kill Qiao Zhiyong. At the critical moment, Tie Xinshi killed Cui. Ring ten.

Character evaluation:

Absolutely key figure, without him delivering the letter, there would be no success for Qiao Zhiyong; without him, Qiao Zhiyong would still be plotted by Cui Mingshi; without him, Qiao Zhiyong would have been very early Throw away your life!

Tie Xinshi left home to learn martial arts from an expert when he was young. Once he was in trouble, in the play, Tie Xinshi became a hungry man and was rescued by Miss Lu. Tie worked as a coachman in Qiao Mansion and wanted to avenge his family, but he didn't do it because of Lu's face. He was rescued by Qiao Zhiyong's wife Lu and adopted as a groom. Because of his high martial arts skills, he always protected Qiao Zhiyong. Finally, he died protecting his master while accompanying Qiao Zhiyong to help Zuo Zongtang regain Xinjiang.