Nitpick: There's only one Chinese embassy in the USA, in Washington D.C.
The other diplomatic offices are consulates.
If it's anything like the Chinese Embassy in New Zealand, there's usually regular protests outside, for a variety of reasons. Their response would be to ignore them, like they usually do.
Where I grew up, there were pretty frequent protests infront of the Chinese embassy. Year after year. I saw something similar at a Chinese consulate in the US once.
I spent two years in Hong Kong. There were frequent (weekly) protests at Chinese buildings (I remember one in particular that seemed to always have a crowd of people, in Sheung Wan, on Connaught Road I think?). It was always super peaceful, from both sides.
> There were frequent (weekly) protests at Chinese buildings (I remember one in particular that seemed to always have a crowd of people, in Sheung Wan, on Connaught Road I think?).
The Beijing liaison office. That's attracted a lot of protests in the past few weeks, and has had a temporary barricade around it for about as long.
I'm not sure that's true in the long term either, an invasion might not be possible, but what's to stop China bombing enough power plants and other infrastructure to send the country back to the stone age and invading after everything fallen apart? Even the bombing part they might not have to do directly, blaming it on some terrorist group.
There's been protests at the London Chinese embassy fairly frequently since 1997. More visible and frequently reported during the 2014 umbrella protests, and again during these protests.
I'd be a little surprised if there haven't been similar at embassies in the US - perhaps they're just not attracting enough numbers to be widely reported?
The other diplomatic offices are consulates.
If it's anything like the Chinese Embassy in New Zealand, there's usually regular protests outside, for a variety of reasons. Their response would be to ignore them, like they usually do.