Trịnh Cương had Nguyễn Công Hãng draw up a new tax system of land tax, labour tax and service tax, grading public fields by the number of harvests; it was settled in 1722.
Political
Tô–dung–điệu tax reform
- 1721 – 1722
- Southeast Asia
Meanwhile, elsewhere
- 14th century – 17th centuryRenaissanceEurope
- 17th century – 19th centuryAge of EnlightenmentEurope
- 1700 – 1721Great Northern WarEurope
- 18th century – 19th centuryRomanticism
- 1688 – 1697Nine Years' WarEurope
- 30 April 1707Acts of Union 1707Europe
- 1701 – 1714War of the Spanish SuccessionEurope
- 1709Battle of PoltavaEurope