Let’s talk about what nanaisheng means.

1. The Japanese pronunciation of "Nanasei" is very similar to "Nanami", which is a character in a Japanese anime called "Genki Shoujo Yukinami". The male protagonist is Ba Wei, and when he calls the female protagonist Nanaisheng, the word "Nanami" is really cool. Therefore, when a girl asks you to imitate "Nanami", she actually asks the male god to call the female protagonist by her name, as if she is Nanami and has the male protagonist Ba Wei.

2. The heroine’s name is actually Nanaisheng, pronounced like Nanami. Everyone asked their friends to say Nanami because they wanted to imitate the feeling of the male protagonist calling the female protagonist's name, as if they own the male protagonist.