This will be interesting politically.
America just encountered a true galactic power. A true galactic power that is very involved with their Galaxy, unlike the Asgard who had barely a presence at all due to their war and decline. This isn't some human society that's stuck in the past either nor is it an advanced human society that has long since stagnated like so many others SG-1 would have encountered. The Empire of Wu is advanced, massive, and still growing.
If someone views the situation in relative sizes this is the equivalent of a modern continent spanning nation coming into contact with one tribe of a Stone Age society who live on an island of many other tribes.
Sure the island might be the birth place of their entire species, but what can the one tribe really offer the nation that it doesn't already have (besides access for the nation's archaeologists). And who is to say that the nation won't contact the other tribes as well?
Surely the American diplomats will realize this and it will probably scare them shitless. In fact I don't think America has actually been in a position like this before. They aren't talking to an inferior power or even one on equal footing, they are very much the ants in this meeting and the Empire of Wu can basicly do anything they want while holding up a middle finger.
The Empire wants to contact China? Good luck stopping them. The Empire wants to reveal their existence to the world? Not much they can do about it.
In fact I could see this meeting resulting in the SG program being revealed to the other world powers early.
I mean from the outside the Empire of Wu is an imperialistic power which conquers worlds they consider primitive and proceeds to uplift them while using secret police so that the new territory can integrate into the Empire better.
American officials might very well believe that earth needs to present a unified front in order to avoid being swallowed up.
Weren't there a few Mary Sue defences? The drones and such?