Come on, think. What would the Chinese gain by seriously pissing off their biggest trading partner, who is the cornerstone of their economy? Compare to the UK who has to weigh up pleasing their longtime ally the US and pissing off Ecuador.

If you're holding up the Chinese not violating the sanctity of the US embassy as a noble example, surely the annexing the entire nation of Tibet should counter that. Tibet was small fry. The US has the largest economy, military, and set of military allies in the world.

EDIT: Also, the "Freedom Fries" period in the last decade caused some damage to the French economy over a preceived slight that didn't even exist. Having China march into the US embassy would have a ton of ramifications from the US public pulling business, not just the government.

I don't think it is a fair comparison. There is a reason he went to the embassy of the world superpower and not Ecuador's embassy-- which China may have been much less likely to respect.