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).
book / letter / document / CL:本[ben3],冊|册[ce4],部[bu4] / to write
书
=
丨
+
㇆
+
丶
:
Sheldon Shrimp (shu) is enjoying a good book (书) in front of the space station (Ø1). Because he is lazy, he built a thingy to hold the pages in place with a dinosaur bone (丨) and two plows (㇆). He is laying very comfortable on a petal (丶) serving as sofa.