Judging from the plot of the story, he is one of the heroes of 108, and all the poems sum up his rich and wonderful life, so his silence after reading the letter is a complete success, which is the best ending for him.
Second: Why does a healthy person die when he says he is dead? This sounds a bit metaphysical, but it does exist in real life. My grandfather is a typical example. At the age of 90, I was still farming, very healthy and tough, and I didn't look like a 90-year-old.
One day, he plowed home, ate dinner and ran to his uncle's house, arranged all the affairs and left. The uncle's family was puzzled and thought they were senile and didn't take it seriously. As a result, grandpa really left the next morning. Everyone thinks it's mysterious. It is said that old people may see the end of their lives when they reach a certain age, especially when their grandfather is a local maoshan taoist. Everyone thinks this is very likely. What is it? In fact, many things cannot be explained. Like many people who have been ill for a long time, it is impossible to make it clear in a scientific way. So as soon as monk Lu heard the tide letter, he knew he was leaving. Maybe there is something mysterious in the traction. After all, China already had the knowledge of the Book of Changes, Zhouyi and other numerology, but that doesn't mean it doesn't exist. He wrote a letter in advance, summed up his life and proved that he really knew that the end of life had come. Life is a journey, and he arrives at the destination ahead of time.
Third: suicide theory, this possibility is very rare. Hearing the tide letter, I remembered the melody and felt I had to go. I wrote a suicide note and committed suicide. Although I said that Lu killed countless enemies in his life, when he recruited Fang La, his brothers suffered numerous casualties, and he was very disappointed with Song Jiang and others. The nearest Song Wu is still there, and Lin Chong is still there. So, he didn't suffer so much trauma and committed suicide.