国际贸易

国 = 囗 + 玉 : Mnemonic symbol: a nation's flag. Let's say the Chinese flag.

In the observatory's kitchen (o2) Gitta Giraffe (gu) is practising her ballet performance. She got a whole crate (囗) full of jade bracelets (玉) and flags (国) and fixed one flag to each jade bracelet. This makes a perfect combination for throwing the ring with the flag waving behind it and catching the ring again after a few pirouettes.

际 = 示 + 阝 : Joan of Arc (ji) and the pope (阝) have an international (际) meeting in the space station's bathroom (Ø4). They decide on the border through the bathroom and mark their territories using standards (示).

贸 = 卯 + 贝 : Mahatma Gandhi (m) is negotiating with a rabbit (卯) and a crab (贝) at a world trade summit (贸) in the aorta's bathroom (ao4).

易 = 勿 + 日 : Mnemonic symbol: a really easy puzzle consisting of only two parts.

Maud Younger (y) and the sun (日) are trying to complete a really easy puzzle (易) in the space station's bathroom (Ø4). It's not as easy as they thought though, because in zero gravity they can only move with the help of their bat wings (勿).