there are more than 50 contributing advisors of the "hkcd". for example: dr. tsang hin chi (曾憲梓), dr. leo lee tung-hai( 李東海), dr. vincent lo hong-sui (羅康瑞), dr. robin chan yau-hing (陳有慶), mr. timothy fok tsun-ting (霍震霆)and mr. chan wing-kee (陳永棋) .