交 交 jiāo Strokes6 Radical 亠 — lid, cover Made of 六 six 乂 to govern How it's builtIdeograph — the meaning is built from its parts Play the animation
换 换 huàn Strokes10 Radical 扌 — hand Made of 扌 hand 奂 numerous How it's builtPhono-semantic — one part hints at the meaning, another at the sound Play the animation