Fu took a chance and ambushed Yen.
3 seconds sound clip from the Return of the Bastard Swordsman movie soundboard.
You can hear this line at 00:05:25.559 in the DVD version of the movie.
Quote context
[...]
- During this period, any particular news?
- Sir, there's no news to report except that it was peace and quiet everywhere except Wudang.
- Sir!
- He has mastered Silkworm Skill. Fu Yu Xue can't kill him.
- Sir! Yen's Silkworm Skill comes and goes.
- Fu took a chance and ambushed Yen.
- I've trained hard to counter his Silkworm Skill. Now... all has gone to waste!
- Why?
- Yun Fei Yang has also learned Silkworm skill. He killed Fu Yu Xue and revived Wudang.
- Nonsense! I have already wasted him. How can he master Silkworm Skill?
[...]