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Chief state councillor who proposed the Daedong tax reform
In 1608, at his urging, Gwanghaegun set up the Seonhyecheong and introduced the Daedong law in Gyeonggi Province first, replacing household tribute in local goods with payments in rice, cloth or coin based on landholding. He also served as Chief State Councillor under Injo.
Tribute in local goods was replaced by a tax in rice levied on land; begun in Gyeonggi, it took a century to cover the whole country.
Fifteenth king of Joseon who began the Daedong law and balanced Ming and the Later Jin; deposed in 1623
Chief State Councillor under Hyojong who extended the Uniform Land Tax Law and urged adoption of the Shixian calendar and minting of coins
From land tax, tribute and labour to cash taxes in the Gabo Reform — burdens shifting from people and households to land