解鈴還需繫鈴人

解 = 刀 + 牛 + 角 : Mnemonic symbol: acetone, in which anything can be dissolved.

Inside of the elevator (e3) Joan of Arc (ji) is dissolving a horn (角). A moment ago she cut the horn from the bull's (牛) head using a cleaver (刀). The bull is still shocked as he sees Joan of Arc dissolve (解) his horn in acetone (解).

铃 = 令 + 钅 : Li Qingzhao (li) is living next to engine, and her neighbors installed some very annoying little bells (铃) next to their entrance ((e)ng2). As a consequence she got an official decree by the emperor and a Ling Pai (令) that allows her to have them remove the bells, but as she visits the engine home no-one is there. Short-tempered she just uses her golden harpoon (钅) to take off the little annoying bells (铃).

还 = 不 + 辶 : Hamlet sees an early exhibit of king Leonidas' gladiator sandals in the airplane's kitchen. However, the exhibition is still not set up but in the progress of being set up, so there's a big sign showing that it's forbidden to touch the sandals.

需 = 而 + 雨 : Mnemonic symbol: When it rains and you do not want to comb your hair again, you need a rain cape.

需 = 而 + 雨 : It is raining in front of the rain station. Because Xu Xian doesn't want to comb his hair again, he uses a rain cape to stay dry.

系 = 丿 + 糸 : Mnemonic symbol: As this is the second character in 关系 (guanxi), I'll use shaking hands as the symbol for 系.

系 = 丿 + 糸 : In the space station's bathroom, Marie Curie found a new binding mechanism in chemistry. To demonstrate her findings, she binds two bananas together with a silk scarf. She celebrates her findings by shaking her own hand over her head.

人 = 丿 + ㇏ : Mnemonic symbol: Neanderthal Man (人). Robinson Crusoe (r-) is looking for snacks in the encampment's kitchen (-en2) when he suddenly spots Neanderthal Man (人). Neanderthal Man offers him a banana (丿), but Robinson Crusoe doesn't trust the present and pokes it with a finger (㇏).