磁力線

磁 = 兹 + 石 : The King of Chu (c) broke open a mysterious, previously sealed rock (石) made of porcelain (磁) just inside the space station's entrance (Ø2). The rock contained a magnet (磁) which as soon as the King of Chu picked up was so powerful as to attract a Nimitz class aircraft carrier (兹), crashing the hull of the space station.

力 = ㇆ + 丿 : Mnemonic symbol: a power button.

Li Qingzhao (li) just had a shower in the space station's bathroom (Ø4) and wants to use the hair dryer, but there's no plug, just the bare end of the cable! She uses all her power to build an electricity plug, and for the two pins she uses a plough (㇆) and a banana (丿). Finally she hits a big power button (力) to turn the power on.

线 = 戋 + 纟 : Mnemonic symbol: barbed wire.

线 = 戋 + 纟 : The silk worm wants to use the floating tank in the anthill's bathroom, but there's already Marie Curie inside—and she secured the tank by setting up barbed wire all around it.