不知利害

不 = 丆 + 卜 : Bruno Bear (bu) is setting up a wind wheel (丆) with a voodoo staff (卜) in the space station's bathroom (Ø4). He also puts a "forbidden" sign (mnemonic symbol for 不) on it, to make clear that it may not (不) be stopped.

知 = 口 + 矢 : Mnemonic symbol: Francis Bacon is attributed to have stated "scientia potentia est", "knowledge is power". I'll thus represent 知 by Francis Bacon. Francis Bacon (知) and James II of England (zh) are playing darts (矢) in front of the space station (Ø1). Because they lack a dart board they just use a mandarin (口).

利 = 刂 + 禾 : Mnemonic symbol: the rocket Arianne, 亚利安娜.

Li Qingzhao (li) prepares to go back to earth in the Arianne rocket (利). In the space station's bathroom (Ø4) she prepares for the trip by stuffing lots of cereals (禾) into the rocket and sharpening (利) the tip of the rocket with a kitchen knife (刂).

害 = 宀 + 丰 + 口 : Mnemonic symbol: Calamity Jane.

Hamlet has just graduated from high school and his still wearing his graduation cap, but Calamity Jane locked him in a golden cage in the airplane's bathroom because she envies him so much. She even gave him no food so far and teases him with a mandarin.