科学管理

• 禾(rice plant)RADICAL
• 斗(threshing floor; rice threshing area)ASSOCIATIVE

To classify rice grain by measuring each type with a measuring vessel.

• ⺍(two hands (indicating learning))ASSOCIATIVE
• 冖(roof; house)ASSOCIATIVE
• 子(child)RADICAL

A child sitting under a roof with two hands diligently studying represents learning.

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

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

• 王(jade; precious stone)RADICAL
• 里(village; mile)PHONO-SEMANTIC

Polishing rough jade layer by layer along the grain, like dividing the road mile by mile into neat sections.