There are many places in Romance of the Three Kingdoms that pave the way for the following. Please choose three places and explain which one set the stage for Xiaguan.

First, when Guan Yu was temporarily attached to Cao Cao, Cao Cao was very kind to Guan Yu. On the third day, we had a small banquet. On the fifth day, we boarded a bag of gold, dismounted a bag of silver and presented many beautiful red rabbits. Guan Yu is very loyal, of course he will appreciate it. It laid the groundwork for the later Huarong Road Guan Yu to let Cao Cao go.

The second place, Guan Ju's divination, left a "broken stock" prediction, which laid the groundwork for the death of Xiahou Yuan in Dingjun Mountain below. (Xia is related to Cao Cao)

Third, when Liu Bei entrusted orphans, he once asked Zhuge Liang what Masulike was. Zhuge Liang said that Ma Su was good, but Liu Bei said that Ma Su was exaggerating and could not be reused. Zhuge Liang didn't listen, laying the groundwork for the defeat of Ma Su Street Pavilion.