四川盆地

• 囗(frame; surround)RADICAL
• 儿(person; foot)ASSOCIATIVE

Four sides of a square frame surround two legs — the ancient form of the number four.

• 皿(bowl; container)RADICAL
• 分(divide; share)PHONETIC

A basin is a round container used to hold and distribute water or soil.

• 土(earth; soil; land)RADICAL
• 也(also; punctuation mark (archaic))PHONETIC

The wide earth (soil) is also where all things flourish and grow.