He's the only son of a very powerful family which claims to support my rule.

7 seconds sound clip from the The Bitter Tea of General Yen movie soundboard.

You can hear this line at 00:58:52 in the Blu-ray version of the movie.

Quote context

[...]

- But now that you missionaries have taught her to read and write, she's a constant menace as long as she's alive.

- I feel sorry for you, General Yen.

- A powerful man like you afraid of a poor little slave.

- The only way to get loyalty is to compel it.

- Take Captain Li, for example.

- He's the only son of a very powerful family which claims to support my rule.

- All right. I believe them. But as evidence of their good faith, I made them place him in my hands as a hostage.

- Now, if they would betray me, the life of Captain Li enables me to save my own face.

- That's the way we get loyalty in China.

- That's why China is 2000 years behind the times.

[...]