What kind of person is Song Wu? You can see from which descriptions.

In the ninth description of Water Margin, brazier was mentioned twice, which promoted the plot development through detailed description, and at the same time portrayed the character 1, which promoted the plot development. With the appearance of several descriptions of fire (pot), readers have experienced doubts (how can fires often occur in such a place that is easy to catch fire in the forage field), worries (whether Lin Chong will accidentally cause a fire), reassurance (Lin Chong confirmed that the brazier went out twice) and a greater degree of worry. Where did the fire in the forage field come from). The suspense of this plot keeps readers looking forward to reading. 2. Depicting the character, Lin Chong went to sell wine to eat. When he left the forage field, he "covered the coal" ... and locked two grassland doors. After the thatched cottage was flooded with snow, Lin Chong "was afraid that there was charcoal burning in the brazier", so he "leaned over and touched the brazier. Go to the mountain temple and settle down. These details, on the one hand, show Lin Chong 'an's self-discipline and prudence, on the other hand, tell readers that the fire in the forage field was not caused by Lin Chong's negligence, which makes the plot develop reasonably.