In the Water Margin, Lu Zhishen was originally named Lu Da. Please talk about the meaning of the name Lu Da and the name Lu Zhishen in combination with the specific story.

Lu Zhishen can be said to have the best ending in the Water Margin. His original name is Lu Da. From the name, he is a rude image of a big man. The stories of punching the town of Kansai, making a scene in Wutai Mountain, making a scene in Peach Blossom Village, and uprooting weeping willows all fully illustrate this point. However, after he became a monk, his master's wisdom for her was undoubtedly a foreshadowing for the later ending. His wisdom was deep, and his wisdom was actually profound.