国家航空公司

• 囗(surround; enclose)RADICAL
• 玉(precious jade; gem)ASSOCIATIVE

A nation is enclosed land that contains precious treasures within.

• 亻(person; human)RADICAL
• 家(family; household)PHONO-SEMANTIC

A person who specializes in making furniture is called a carpenter (house craftsman).

• 穴(row; gap)RADICAL
• 工(craftsman; work)PHONETIC

An empty cave with nothing inside is just hollow space.

• 八(eight; split in two)RADICAL
• 厶(private; personal)ASSOCIATIVE

Public means sharing your private things with everyone to become shared property.