State the purpose directly.

The introduction must be simple and straightforward, so that people can understand what you want to express at a glance.

For example, "If you want to start a business, look for Cui Lei." His profile is "If you ask questions via private message, he will answer all your questions via private message and sending an e-book via private message will be helpful to you."

Self-explanatory.

This kind of writing expresses an attitude, an idea or an explanation of oneself.

For example, the introduction of "Black Face V" is "an idea, an attitude"; the introduction of "Li Ziqi" is "There is a daughter in the Li family, known as Ziqi".