Collective noun is regarded as a singular noun when referring to the whole; When he refers to the constituent molecules of the whole, collective nouns are regarded as plural nouns.
I'm from China. I'm from China/I'm Han/I'm Han.
I'm from China. I come from China.
................... ditto.
All China people: China people.
From the angle analysis, the angle is now set in a space, so the space is the town where this street is located, the street in the town, we can say that it is on the street. Adjust the angle again. On the plane of this street, somewhere, we can say that we are on the street.