Why does Qishenggao eat two bowls of noodles?

Qi Shenggao ate two bowls of noodles and waited for the police to save his brother. He learned that his brother Gao Qi wanted to get rid of Li Xiang, so he decided to help his brother, so he went to Xuji noodle restaurant, ordered a bowl of noodles and waited for the arrival of the police. But in fact, he didn't really eat noodles, but used this opportunity to delay the time and wait for the police to appear. In the end, he succeeded in helping his brother out of trouble, but he died unfortunately in this action.