Laurent Sagart
Sino-Austronesian or Sino-Tibetan-Austronesian is a proposed language family suggested by Laurent Sagart in 1990. Using reconstructions of Old Chinese, Sagart argued that the Austronesian languages are related to the Sinitic languages phonologically, lexically and morphologically. Sagart later accepted the Sino-Tibetan languages as a valid group and extended his proposal to include the rest of Sino-Tibetan. He also placed the Tai–Kadai languages within the Austronesian family as a sister branch of Malayo-Polynesian. The proposal is controversial, but still being debated.