Research
Which is the research center of the technology, the higher level means you have more technology

Architecture
Which represent the architecture technology level, different construction needs different architecture technology levels.

Alchemy
Which represent the technology of gold mineral production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Irrigate
Which represent the technology of farming production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Excavation
Which represent the technology of stone mineral production, the higher level means you have higher production yield; one lever higher means 1% more production yield.

Lumbering
Which represent the technology of lumbering, the higher level means you have higher lumbering yield; one lever higher means 1% more lumbering yield.