Left: Water 氵, right: prefecture 州 (Sandbanks 丶 in the river 川 separate the prefectures.) When there is a lot of water at the sandbanks in the river, the prefecture turns into: an island.
Three sandbanks 丶 in a river 川 (They are administrative units within one country) You can get via sandbanks in the river from prefecture to prefecture.
Radicals are shown here that are similar either in appearance or meaning.
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