Why haven't there been any symbols such as European coats of arms or Japanese family emblems in Chinese history?

It's too long and ugly to write on the flag. If you only write a 'y' or an 'e', you can't tell who belongs to whom. You can only circle a pattern and sew it up, making it more and more complicated. It's not like us, where one surname represents one family, and adding colors can already perfectly distinguish all the troops. So I think Europe and Japan should reflect on this wave.
Since you have asked, I will kindly tell you.
You just need to remember one principle, when you discover something that foreign countries have but China doesn't seem to have now, it has been eliminated by China.
Why are there still things in Europe and Japan that have long been eliminated by China when the coat of arms and family crest you mentioned have been eliminated?
The fundamental reason is that their social structure is too backward. Shouldn't they reflect on it?
Here are two more topics for you.
Why does the West use knives and forks while China does not?
Why do the West still believe in feudal superstition (god), while China has faith (people are united, Mount Taishan moves)?
The answer is still the same, because the West is backward, hurry up and reflect.