China jailed a Tibetan businessman for five years on Tuesday for "inciting separatism," his lawyer said, after he advocated the use of Tibetan in schools and was featured in international media reports.

Liang Xiaojun, one of his lawyers, said Tashi Wangchuk was handed a five-year prison sentence but declined to give further details.

The U.S. State Department said it was "deeply disappointed" by the verdict and that Tashi was "exercising his fundamental freedom of expression in calling on the government to give greater attention and resources to teach the Tibetan language in Tibetan areas."