生物链

生 = 牛 + 一 : Mnemonic symbol: a cradle.

Sherlock Holmes (sh) comforts a crying baby bull (牛) in a cradle (生) in front of the engine ((e)ng1) and plays him a tune on a flute (一).

物 = 勿 + 牛 : Willy Walrus (w) wants to become a physicist (物) and does research about dark matter (物) in the space station's bathroom (Ø4). His motivation is to become a super villain and rule the world. Just as he is about to have a breakthrough, a huge black ox (牛) flying with the help of bat wings (勿) hits Willy with an oxerang and takes away the dark matter, saving the world.

链 = 连 + 钅 : Li Qingzhao (li) has been kidnapped and chained down (连) in the anthill's bathroom (an4). Luckily she has a tiny golden harpoon (钅) as a necklace (链) around her neck which she is able to pick up with her mouth, and with which she is able to pick the lock.