Prior to founding GPS in November 2017, Sonny represented clients on a variety of cases, including:
Litigation
- Australian mining company in proceedings in the High Court to enforce an Australian arbitration award in Hong Kong
- Incorporated owners of a luxury residential building in High Court proceedings in Hong Kong against an architect
- Big-four accountancy firm in its capacity as receivers of a Hong Kong listed company (HCMP 395/2015 - In the matter of Birmingham International Holdings Limited)
- HK$2 billion creditor in a heavily litigated winding up proceeding in Hong Kong against a Hong Kong listed company (HCCW 177/2011 - In the matter of The Grande Holdings Limited)
- Minority shareholder in a winding-up petition on just and equitable grounds brought in the Cayman courts against a Hong Kong listed company (FSD 14/2015 - In the matter of Boshiwa International Holding Limited)
- Owner of property in an industrial building in a High Court action against the incorporated owners (HCCT 60/2009 - Wing Ming v The Incorp. Owners of Wing Ming Industrial Centre)
- Various owners of properties within old multi-story buildings in appeals before the Appeal Tribunal (Buildings) against demolition orders made by the Building Authority of Hong Kong
- Hong Kong listed media company in winding up proceeding against it (HCCW 120/2015 - In the matter of Sing Pao Media Enterprises Limited)
- Former directors of a property management company in claims against them for breach of fiduciary duties (HCA 744/2013 - Vigers Hong Kong Limited v Michael Binney and others)
- Korean chaebol in an appeal to the Court of Final Appeal involving the interpretation of a contract associated with a large reclamation project (Sinoearn International Limited v Hyundai CCECC Joint Venture FACV 22/2012)
- Main contractor in two cases in the High Court involving disputes with piling subcontractors (Chun Wo Foundation Limited v Sam Woo Holdings Limited HCA 654/2011 & Sam Woo Bored Pile Foundation Limited v Chun Wo Foundation Limited HCCT 49/2008)
- a case in which sovereign immunity was invoked to resist enforcement of an international arbitration award against a state (FG Hemisphere v Democratic Republic of Congo & Ors HCMP 928/2008)
- Shareholder actions and statutory derivative actions (Tsang Wai Lun Wayland v Chu King Fai & 11 other directors HCA 300/2009 & Tsang Wai Lun Wayland v Grand Field Group Holdings Ltd HCMP 1059/2008);
- cases against incorporated owners of multi-storey buildings involving maintenance responsibilities and injunctions to remove unauthorized building works (Cogi v Incorp. Owners of Malahon Apartments HCA 816/2004; Wing Ming v The Incorp. Owners of Wing Ming Industrial Centre HCCT 60/2009)
- trademark infringement / passing off dispute (Opus Crystal Studio Ltd v Aupu Group Holding Co. Ltd HCA 782/2007)
- Sovereign immunity case to resist enforcement of an international arbitration award against a state (FG Hemisphere v Democratic Republic of Congo & Ors HCMP 928/2008)
- Shareholder actions and statutory derivative actions (Tsang Wai Lun Wayland v Chu King Fai & 11 other directors HCA 300/2009 & Tsang Wai Lun Wayland v Grand Field Group Holdings Ltd HCMP 1059/2008);
- Incorporated owners of multi-storey buildings involving maintenance responsibilities and injunctions to remove unauthorized building works (Cogi v Incorp. Owners of Malahon Apartments HCA 816/2004; Wing Ming v The Incorp. Owners of Wing Ming Industrial Centre HCCT 60/2009)
- Trademark infringement/passing off dispute (Opus Crystal Studio Ltd v Aupu Group Holding Co. Ltd HCA 782/2007)
Arbitration
- Hong Kong contractor on claims arising out of design issues associated with a HK$8 billion contract for viaducts
- Korean chaebol in a successful appeal to the Court of Final Appeal involving the interpretation of a contract associated with dredging works for a new container port
- Mainland Chinese contractor in Singapore arbitration under ICC Rules against a Vietnamese-Japanese joint venture cement production company to recover claims and damages arising out of the construction of a cement processing plant in Vietnam
- Hong Kong listed energy company with mining assets in the PRC in arbitration proceedings in Hong Kong (under the UNCITRAL Rules) against a large PRC steel-making company in respect of a HK$300 million claim arising out of a convertible notes sale and purchase agreement
- Korean construction company in claims against a sub-contractor arising out of the termination of a contract for construction of a US$550 million petrochemical plant in the Philippine
- US listed metals company in arbitration proceedings in Hong Kong (under the ICC Rules) against a Chinese state-owned aluminium company in respect of claims of RMB290 million arising out of an investment in an aluminium slab making facility in China and a long-term supply contract for aluminium slab
- Texas-based technology company in arbitration proceedings in Hong Kong (under the HKIAC Rules) against a Chinese company in respect of claims arising out of the supply of defective LED panels and intellectual property rights in the LED panels
- Korean chaebol in arbitration proceedings in Hong Kong defending claims from a property developer for alleged defects in a new property development
- Multinational US oil and gas company in claims against a Chinese state-owned oil company arising out of a joint investment to develop sour gas fields in Sichuan Province, PRC
- Hong Kong distributor of cosmetics in arbitration proceedings in Singapore (under the SIAC Rules) and in Japan (under the UNCITRAL Rules) against a Japanese company concerning the termination of a 30-year Asia-wide distributorship agreement