空中交通管制

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

An empty cave with nothing inside is just hollow space.

• 口(mouth; rectangular frame)ASSOCIATIVE
• 丨(vertical line through the middle; axis)ASSOCIATIVE

An arrow hitting the center of a target frame is the bull's-eye—that's CENTER.

• 六(six; intersection)ASSOCIATIVE
• 乂(cross; intersect)PHONETIC

Two diagonal lines crossing like human legs stepping represent intersection and exchange.

• 辶(step; move)RADICAL
• 甬(passage; channel; path)PHONO-SEMANTIC

Following a clear pathway or passageway is the meaning of the character.

• ⺮(bamboo)RADICAL
• 官(official; manage)PHONO-SEMANTIC

A bamboo tube is managed by officials, so 管 means both tube and to manage.

• 巾(cloth; scarf)ASSOCIATIVE
• 刂(knife; cut)RADICAL

Making is using a knife to cut cloth into a desired shape.