What is the structure of Chinese characters?

Nothing is a simplified word, the radical "I" is 1, the external stroke is 3, and the total stroke is 4. Single structure.

Traditional Chinese characters without words

Base unicode:7 12 1

There are 4 "rhyme" radicals and 8 external strokes, with a total stroke of 12. Upper and lower structures.

References:

Chinese dictionary 2, page 2370, word 14,