As the political basis of the Joseon government was changed since the days of King Sukjong and it tried to bring Jeju into the range of its rule, the central government made efforts to the burden of the donation upon Jeju. In the first half of the 18th century, tangerines were less burdened. And it wanted to facilitate the supply of grain to Jeju by running a state-run commerce. However, due to the upsetting nature of state-run commerce, the results were not achievable. In the late 18th century, the governments policies changed. The government wanted to facilitate the supply of Jejus grain through private trade. It allowed partial freedom in commerce between Jeju and land. It also gave Jeju preferential treatment for its competitive products. Through these measures, Jejus commodity economy developed and profits derived from it increased. It was some of Jejus scents that were quick to cope with this situation. They made a large part of the commercial profits by organization of the petty officials of Jeju, called Sangchangye(相贊契). The king and the government wanted to return some of the surplus products of the royal family to the people as part of the paternal love policy, but they ended up belonging to the a local influential person and the petty officials of Jeju. This socio-economic situation is thought to have been behind the plotting treason accident of Jehae Yangp in 1812 and the peasant uprising in 1862.