There is an old saying: You can only get rich in three generations.
The old Li family has been rich. A few generations ago, the old Li family was the richest family in the village. By Li Mingyuan's generation, the old Li family was poor.
There is an old saying: a skinny camel is bigger than a horse.
However, when the old Li family came to Li Mingyuan's generation, they were so poor that they couldn't even find camel hair. In the end, Li Mingyuan was so poor that he demolished the beams of the house to sell them, and was almost killed by the falling beams. So the old people in the village said that Li Mingyuan had done bad things and ruined the old Li family's reputation, which offended his ancestors.