you are right .it's an kind of chinese joke.we called it "cold‘ jokes.Most of time ,you can't understand them immediately.but when you get it,you will brust to laugh.it's chinese humor.
Here's how I would write English:
You are right, it's a kind of Chinese joke. We called it "cold" jokes. Most of the time, you can't understand them immediately. However, when you get it, you will burst into laughter. It's Chinese humor.