Dr So is a partner of Grandall Zimmern Law Firm. He advises on shareholders- and equity-related disputes, property-related litigation, libel litigation and media-related litigation work as well as litigation and arbitration in Mainland China. He represents financial institutions, property developers and corporations as well as Chinese enterprises on securities- and equity-related disputes. Dr So has acted as Arbitrator and Mediator in shareholders and other disputes, and is on a number of panels of arbitrators in Asia. He has also acted as Deputy Judge at the District Court and Temporary Deputy Registrar at the High Court. He is a China-Appointed Attesting Officer (appointed by the Ministry of Justice of China). He was the President of The Law Society of Hong Kong, and is a solicitor-advocate with rights to appear in the higher courts in Hong Kong.