Its entirely possible that your friend could be detained upon presentation at HK Immigration channels.
The Bankrupty Ordinance provides that upon an application by a creditor to the court, the court may, if it has probable reason to suspect and believe the debtor has absconded and gone outside Hong Kong with a view to avoiding service of a bankruptcy petition [or to avoiding appearing in a bankruptcy petition, or to avoiding examination in respect of his affairs ect ect, and a bunch of other reasons], then the court may issue a warrant authorising the Bailiff of the High Court of Hong Kong and his assistants and to all police officers of Hong Kong and to the Commissioner of Correctional Services to take the debtor and to deliver him to the Commissioner of Correctional to keep in prison until such time as the court may order.
Id say, your friend better make arrangements before deciding to leave......