Summarize a short story in the Water Margin, about 150 words, preferably two, thank you.

Song Wu passed by Jingyanggang. I drank a lot at Gangxia Hotel and then went to Shang Gang. A tree reads: "Recently, there was a big bug in Jingyanggang, but it was in Ke Gang. You should team up to cross the gang. Please don't make mistakes. " Song Wu thought it was a scary letter from the winemaker. In order to let passers-by live in his shop, he ignored it and moved on. When the sun was about to set, Song Wu came to a ruined temple and saw the government notice posted at the gate. After Song Wu finished reading, he knew there was a tiger on the mountain. He had to go back to the hotel, and he was afraid of jokes from the store, so he continued. When he had a hangover, he found a big bluestone and lay back. He was about to fall asleep when a colorful tiger suddenly attacked Song Wu. Song Wu quickly dodged and hid behind the tiger. When the tiger jumped, Song Wu hid again. When the tiger is in a hurry, it shouts at Song Wu with its tail. Song Wu quickly jumped away again. While the tiger turned around, he raised his whistle stick and slammed it on the tiger's head with all his strength. With a click, the whistle stick hit the branch. The tiger came at Song Wu again. Song Wu threw away half a stick and rode on the tiger's back. He grabbed the skin on the tiger's head with his left hand and slammed it with his right hand. It didn't take long to beat the tiger's eyes, mouth, nose and ears with blood everywhere, and he couldn't move on the ground. Song Wu was worried that the tiger would play dead, so he raised half his whistle stick and played for a while. He stopped when he saw that the tiger was really out of breath. Drag the tiger down the mountain