Farm directors refer to persons personally directing agriculture and animal husbandry operations, and chiefly responsible for determining the household's farming and livestock raising business strategies or directing management of various agricultural undertakings. Every farming household should have one and only one farm director. Farmers and livestock raisers who do not engage in agriculture or animal husbandry may still constitute farm directors if they make decisions concerning these aspects. Farm successors refer to successors personally engaging in farming or livestock raising work, and do not constitute the heirs of land fit for cultivation. Generally speaking, farm and livestock raising success is refer to the at least 15-year-old children or siblings of farm directors or persons chiefly engaged in farming; thanks to their continuing farming or willingness to engage in farming, they will assume responsibility for the household's farming and livestock raising in the future. There is no limit to the number of farm successors.