```
"The root of the calamity that overturns the Great Jin?"
```
```
This topic was so grave that Hong Lie instantly lost his appetite for meat, he stared with his big, bell-like eyes at the other person and asked, "Are you exaggerating that much?"
```
```
Wu You said solemnly, "The men who come to the north to join the army are spirited and valiant fellows. The Great Jin Dynasty has a ten-year military enlistment system, but when old soldiers complete those ten years, they generally can't stay on. You know the reason for that, don't you?"
```
```
Upon hearing this, Hong Lie fell silent. Of course, he knew. After all, those who went north did so seeking to earn military honors, since it was a new dynasty and the common people could survive just by farming. If they didn't harbor some ambition, who would be willing to do the life-risking work in the north?
```
```
