The rain is not harmonious.

1 Yes, Yu Fei is homophonic with He Fei, which is often called by netizens.

This is because "NAND" is a type of logic gate in circuit science, and "NAND" itself has the meaning of "no", which is often used to mean "dislike" and "opposition" in network language, so it is similar to the pronunciation of "NAND" and becomes a network language.

3 has become a phenomenon of network culture, not only a joke and ridicule, but also represents the development and evolution of network language and network culture.