The majority of such documents comprise fixed agreements regarding land, houses, levies, division of property, loans and indentured labor, and these are also the types of material with the highest level of historical credibility.
其中囊括地契、房契、租稅契約、分家書、借據、賣身契等約定效用的契約書是古文書的最大宗，也是古文書中信度最高的史學資料。