Who can briefly talk about the content of "killing Ximen Qing" in Water Margin?

When Pan Jinlian saw that Song Wu was handsome, he expressed his affection. One day, Song Wu will go to Beijing on business and go home to say goodbye to his brother. Pan Jinlian flirted with Song Wu, who was aboveboard. When he saw this, he sternly reprimanded him. Pan Jinlian became angry from embarrassment and drove Song Wu out of the door. After a while, Wu Da came back. Song Wu told his younger brother that after he left, he should stay at home more and go out less. My sister-in-law said to wait patiently for him to come back. One day, Pan Jinlian accidentally opened the curtain and hit Ximen Qing on the head with a bamboo pole. Ximen Qing is a bully in yanggu county. Seeing Pan Jinlian's charm, he planned to hook up with Wang Po, the west neighbor. Soon, the peddler learned about it, and he informed Wu Da that Wu Da rushed to the Wangs, but Ximen Qing kicked Wu Da and poisoned him, and ordered Uncle He Jiu, who buried the body, to cremate Wu Da's body. When Song Wu came back from a business trip, he saw the flaw, specially prepared water wine and invited all relatives and neighbors to inquire, chased out the truth and complained to the authorities. But the magistrate was bribed by Ximen Qing and hit forty times. Song Wuda was furious and rushed to Lion Building to kill Ximen Qing, then went home to kill Pan Jinlian and avenge his brother.