What was the development of wasteland reclamation in Jin and Yuan Dynasties?

Since Jin and Yuan Dynasties, the geographical distribution of wasteland has changed. Jurchen entered the Central Plains and stationed troops all over the country in order to stabilize her rule. The Jin government distributed farmland in the location of the garrison, and the soldiers were self-sufficient, so the reasons for stationing farmland were all over the mainland and the border. The Yuan Dynasty has a vast territory, and "all the guards are inside, and the provinces are outside, and they are all wasteland". The Ming Dynasty inherited the military household system of the Yuan Dynasty, and the descendants of military households were soldiers for generations, fighting outside and sowing seeds at ordinary times. There were 5,600 soldiers and guards in Ming Dynasty, with 1,000 households 1 120 and 100 households 1 12. The military garrison organizations are adapted to the garrison system, and the garrison is spread all over the country.