gang = river

A bulb of Garlic swats a little ping-pong ball, which lands with a bright Ping in a winding River.

How to remember 강

Each sound in gang has a picture. Put them together and you get the scene above.

강
ga → Garlic

ng → Ping

저거 강이에요.

Jeogeo gang ieyo.

That's a river, over there.

Learn gang in Korean lesson 4, free.