Why do so many people on WeChat have this emoticon? But there are none in my WeChat emoticon.

This is an emoji expression. Generally, the built-in expressions of Android systems do not include complete emoji expressions. The ios system has more emoji. It is recommended to download apps such as Sogou Input Method or Xigua Input Method, which have many emoji expressions.

Emoji (Japanese: 絵字/えもじemoji) are visual emotional symbols used in wireless communications in Japan. Emoji refers to pictures, and text refers to characters. They can be used to represent a variety of expressions, such as A smiley face means laughter, a cake means food, etc.

In NTTDoCoMo's i-mode system phone system, the size of the emoji is 12x12 pixels, and when transmitted, a graphic has 2 bytes. Unicode encodings are E63E to E757, while Shift-JIS encodings are from F89F to F9FC. The basic emoji has 176 symbols, and in the C-HTML4.0 programming language, an additional 76 emotional symbols are added.