@Re90 You don't say, Captain Obvious. I already explained that, but it seems my last comment was deleted by a mod.
Oh well, "received help from outside (or 'another state' according to some translations)" could mean anything. And the author handled this pretty much as 99% fiction.
But hey, I understand there are ignorant people out there (not you, I guess) who think reading something from Wikipedia is enough to know about Chinese history. Even when it's obvious not everything is recorded in world history. Even more so when there are hundreds of unreliable sources, and the only reliable one is an open and generic sentence from a scholar who just wanted to write a short annotation.