禁止吸煙

禁 = 林 + 示 : There's a small forest of two Christmas trees (林) in front of the encampment ((e)n4). Although there's a sign clearly stating that it is forbidden (示) to touch the trees, Joan of Arc (ji) set up her guideon (示) so that it is supported by the two trees and she can practice pull ups.

止 = ⺊ + 丨 + 一 : Mnemonic symbol: a barrier. James II of England (zh) is marking his area in the space station's living room (Ø3) with a big barrier (止), in front of which he sets up his pennant (⺊). He places a soldier left and right to the barrier, armed with a dinosaur bone (丨) and a flute (一) respectively.

吸 = 及 + 口 : Just when Marie Curie (xi) and Yuwen Huaji (及) were on a space trip in front of the space station (Ø1) they encountered an emergency: the failure of their oxygen supply. Their last hope is a hollow mandarin (口) they brought, out of which they suck (吸) their oxygen.

烟 = 因 + 火 : Maud Younger (y) is giving René Descartes (因) fire (火) for his tobacco (烟) pipe in front of the anthill (an1).