Because Mandarin makes up a joke story with 400 words.

A joke caused by the existence of homophones due to the shortcomings of Putonghua itself.

A single man, looking for a woman he likes, went to a matchmaking agency to ask. A Mandarin-speaking matchmaking agency introduced him to a "Miss Qian J Ρ n", and the single man said "Yes, yes, that's her" without even looking at the photo. The next day, the single man was waiting for "Miss Qian J and N" in the restaurant. Unexpectedly, a woman in rags and as poor as a pig came. The woman calls herself "Miss Qian JΡ n".

The single man immediately went back to the matchmaking agency and gave the Mandarin speaker a good beating. While playing, he said, "I let you speak Mandarin, and I let you speak Mandarin, which is nothing more than trouble!" Since then, matchmaking agencies have only recruited people who can speak dialects that have preserved ancient Chinese.

Originally, the pronunciations of "Jin" and "Jin" in Putonghua were both J ρ n. However, in dialects that retain ancient Chinese, the pronunciations of the two words are different and the distinction is obvious.

In ancient Chinese, J and G in Mandarin are "G".

"Jin" is pronounced as "Gοm" in dialects that retain ancient Chinese, with a closed m at the end, which is equivalent to the end of English come.

"Jin" is pronounced as "GρN" in dialects that retain ancient Chinese, and its rhyme ending is the same as that in Mandarin.