Left: happy 吉 (simplification of 喜, where the scholar 士 has beans 豆 in the mouth 口 and is happy.), right: page, head 页 (=頁; head 目 with shoulders 八 and eyebrows 一)
Mnemonic
The happiness (above) the heads is: to fly upwards.
Picture of an eye 目 with emphasized eye-brows 首 to express the special: the head or the chief. (When used as a radical often without eye-brows 頁 meaning forehead). It is always at the right side of a character.
Tip: Go to the radicals that are contained in this character and learn all the characters with this radical systematically!
Vocabulary
仓颉
Cāng Jié
Cang Jie, legendary scribe of the Yellow Emperor and creator of Chinese writing; Cangjie input method (computing)
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