Bihua is the strokes in every hanzi. Strokes is the very basic form to write a hanzi/chinese character. Every hanzi is formed up by strokes combination.

Strokes[edit]

Source : https://en.wikipedia.org/wiki/Written_Chinese

Main article: Stroke (CJK character)

Character components can be further subdivided into strokes. The strokes of Chinese characters fall into eight main categories: horizontal (一), vertical (丨), left-falling (丿), right-falling (㇏), rising (lower element of 冫), dot (、), hook (亅), and turning (乛, 乚, 乙, etc.).[21]

Types of Strokes in Chinese Characters - Learn Chinese Everyday ...

Basic rule of writing Hanzi / Chinese character

There are eight basic rules of stroke order in writing a Chinese character:

  1. Horizontal strokes are written before vertical ones.
  2. Left-falling strokes are written before right-falling ones.
  3. Characters are written from top to bottom.
  4. Characters are written from left to right.
  5. If a character is framed from above, the frame is written first.
  6. If a character is framed from below, the frame is written last.
  7. Frames are closed last.
  8. In a symmetrical character, the middle is drawn first, then the sides.

These rules do not strictly apply to every situation and are occasionally violated.[22]