Di Xin
Cao Pi asked: "If we follow what you said, does that mean that we will have to leave it to our descendants to eliminate our enemies?" Xin Pi replied: "In the past, King Wen of Zhou knew that the time wasn't ripe yet, so he left it to his son King Wu of Zhou to eliminate King Zhou of Shang. If the time isn't ripe yet, I don't see why we shouldn't wait!"