《史记·七十列传·刘敬叔孙通列传》
只能够从长计议让他的子孙后代臣服汉朝了，但是恐怕陛下不能做到。 
独可以计久远子孙为臣耳，然恐陛下不能为。 
We can only plan in the long term to let his descendants surrender to the Han Dynasty, but I'm afraid that Your Majesty will not be able to do so.