China's Hong Kong Special Administrative Region (SAR) government announced Tuesday a major cabinet re-shuffle.

Secretary for the Civil Service Paul Tang has resigned, citing "unexpected family reasons." His replacement is Clement Cheung, the commissioner of Customs and Excise.

Separately, Home Affairs Secretary Tsang Tak-sing said he's " glad to resign," and he's being replaced by Lau Kong-wah, the under secretary for Constitutional and Mainland Affairs.