The Sinkang Manuscripts (Chinese: 新港文書; pinyin: Xīngǎng wénshū; Wade–Giles: Hsin-kang wen-shu; Pe̍h-ōe-jī: Sin-káng bûn-su; also spelled Sinkang or Sinkan) are a series of leases, mortgages, and other commerce contracts written in the Sinckan, Taivoan, and Makatao languages. Among Han Chinese, they are commonly referred to as the "barbarian contracts" (Chinese: 番仔契; pinyin: Fānzǐqì; Pe̍h-ōe-jī: hoan-á-khè). Some are written only in a Latin-based script, considered the first script to be developed in Taiwan itself, while others were bilingual with adjacent Han writing. Currently there are approximately 140 extant documents written in Sinckan; they are important in the study of Siraya and Taivoan culture, and Taiwanese history in general although there are only a few scholars who can understand them.