四
=
儿
+
囗
:
Mnemonic symbol: a four-leaved clover. Socrates (s) is working out in the bathroom of the space station (Ø4). He's lifting four (四) wooden boxes (囗), and wonders why they are so heavy. He doesn't know that inside one of the four boxes, the monkey king (儿) is hiding and secretly laughing at him - until the monkey king comes out and surprises Socrates with a four-leaved clover (四).
旧
=
丨
+
日
:
In the year 2076 Joan of Arc (ji) and the sun (日) meet again in the outhouse's bathroom (ou4). They are both very old (旧) and have to use dinosaur bones (丨) as crooks.