萬寧市

万 = 丆 + ㇆ : As mnemonic symbol I choose a neuron, since each neuron is said to connect to 10000 others.

万 = 丆 + ㇆ : Willy Walrus needs to dig up the floor in the anthill's bathroom, but he is tired of doing so manually with a plough. To make his life easier, he sets up a wind wheel for electricity, connects a neuron to the wind wheel and the plough to transmit the electricity and uses his new DIY electric plough to dig much faster.

宁 = 丁 + 宀 : Mnemonic symbol: 列宁, Vladimir Ilyich Lenin.

Vladimir Lenin (宁) enters engine's kitchen ((e)ng2) when Nefertiti (ni) is preparing dinner. Nefertiti thinks Lenin wants to start a revolution, so she immediately tries to throw him out, but Lenin tells her he wants to remain peaceful (宁) and learn how to cook. As sign of humility he even takes his graduation cap (宀) and nails (丁) it to the wall.

宁 = 丁 + 宀 : Mnemonic symbol: 列宁, Vladimir Ilyich Lenin.

Vladimir Lenin (宁) enters engine's kitchen ((e)ng2) when Nefertiti (ni) is preparing dinner. Nefertiti thinks Lenin wants to start a revolution, so she immediately tries to throw him out, but Lenin tells her he wants to remain peaceful (宁) and learn how to cook. As sign of humility he even takes his graduation cap (宀) and nails (丁) it to the wall.

市 = 亠 + 巾 : Mnemonic symbol: a supermarket.

Sherlock Holmes (sh) started a supermarket (市) in the space station's bathroom (Ø4), but all he has for sale right now are berets (亠) and towels (巾). He should have opened it at the beach!