二 Radical 7 — two
Where the shape comes from
Two tally strokes, the lower one written a shade longer so the pair does not look top-heavy. It continues the plainest counting series in the script, 一 二 三, and it heads 五, 井, 云 and the classical 于.
characters filed under 二
No published character on HSK Guide is filed under this radical yet. Character explorer.