All four defendants in the bribery case of former government No 2 Rafael Hui Si-yan lost their appeal against conviction on Tuesday.

Adam Kwok Kai-fai said his father, former Sun Hung

Kai Properties co-chairman Thomas Kwok Ping-kwong, would lodge an appeal with the Court of Final Appeal within the 28-day period. A draft of the documents was already ready, he told reporters.

Hui and the two other defendants have not indicated whether they would lodge their final appeal with the city’s top court.

READ MORE: Hong Kong jury in Rafael Hui graft trial didn’t get right advice from judge, defence counsel alleges as appeal ends

In December 2014, Hui, who served as chief secretary from 2005 to 2007, was jailed for 7½ years for pocketing almost HK$19.7 million in bribes and inducements and committing misconduct in public office.

Victory of ex-minister CK Mak's final appeal strengthened my confidence: billionaire Thomas Kwok's son

— Stuart Lau (@stuart_lau) February 16, 2016

Kwok was sentenced to five years in jail for conspiracy to commit misconduct in public office involving HK$8.5 million worth of illegal payments. His SHKP subordinate Thomas Chan Kui-yuen and another co-defendant Francis Kwan Hung-sang were serving six and five years respectively for handling HK$11.18 million in bribes.

The appeal against Chan’s sentence was allowed, but the length remains the same, at six years.