The only way to do so is to ask them.
yes
Democritus
Yes. Anyone who reads Chinese should be able to do this. many Linguists can also identify Chinese even if they do not know how to read it.
Information that could be used to identify a person includes full name, date of birth, social security number, driver's license number, passport number, email address, and physical address. This information can be used individually or in combination to uniquely identify an individual.
we identify a person by their eyes and face
First of all it's spelled Chinese. Second of all, let's say we are having a conversation, and an Asian person walks by. No offense, but you could tell they are Asian because of their distinct characteristics, If you say, "Hey look at that Chinese guy," that would be considered racism, because you have absolutely no way of knowing if they are Chinese, even if they spoke Chinese. We say "Asian person" because we know that they definitely come from Asia.
chinese
a Chinese person is a native of China, or a person whose parents are natives of China.
Most Chinese identify themselves as being from the Han ethnic group.
because when a mummy chinese person and a daddy chinese person have certain urges for each other...
The chinese are a group of people who either live in China, or identify as such because themselves or ancestors were born in China.
"Zhu hao" could refer to a person's name in Chinese. "Zhu" is a common Chinese surname, while "hao" could have various meanings depending on the context. It could mean "good" or "hoop" among other definitions.