后半场

• 口(mouth; door)RADICAL
• 后(behind; empress (figuratively—one who rules from behind))ASSOCIATIVE

A mouth giving orders from behind the golden throne is the authority of an empress.

• 丷(two diagonal strokes; division in half)ASSOCIATIVE
• 牛(cow; cattle)ASSOCIATIVE

Using a knife to split a cow in half equally shows the meaning of 半 (half).

• 土(earth; soil; land)RADICAL
• 勿(don't; must not)PHONETIC

A wide field of land sounds similar to the word for things or objects.