This radical character has different forms and stroke orders in different languages and different individual characters.
靑 (lower part is 円) is used in traditional Ming typefaces as well as in the Kangxi Dictionary, but it rarely appears in handwritten scripts compared to 青.
In modern Chinese, mainland China's xin zixing (applied to chiefly Simplified Chinese, but may also be used for Traditional Chinese) and Hong Kong's List of Graphemes of Commonly-Used Chinese Characters (Traditional Chinese) adopted 青 (the lower part's first stroke is vertical) that resembles the written form, while Taiwan's Standard Form of National Characters (Traditional Chinese) adopted a slightly different form, 青 (the lower part is 月 with the first stroke left-falling).
In modern Japanese, jōyō kanji adopts the handwritten form 青 and applies it to printing typefaces, while 靑 is used for hyōgai kanji.
Kangxi Dict. Japanese (hyōgai) Korean
Mainland China Hong Kong Japanese (jōyō)
Taiwan
靑
青
青
Sinogram
The radical is also used as an independent Chinese character. It is one of the Kyōiku kanji or Kanji taught in elementary school in Japan.[1] It is a first grade kanji[1]
Fazzioli, Edoardo (1987). Chinese calligraphy : from pictograph to ideogram : the history of 214 essential Chinese/Japanese characters. calligraphy by Rebecca Hon Ko. New York: Abbeville Press. ISBN0-89659-774-1.
GF 0011-2009 Table of Indexing Chinese Character Components prescribes 201 principle indexing components and 100 associated indexing components (in brackets) used in Simplified Chinese. Not all associated indexing components are listed above.