| 1. Hong Kong Professional Counselling Association | | Approved Counselling Supervisor & Associate Fellow | | |
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| 100th FDI Annual World Dental Congress, August 29-September 1, 2012, Hong Kong | 2010-2012 | Chairman, Scientific Committee/Vice-Chairman of Organizing Committee | | |
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| 10th International Conference on Database Systems for Advanced Applications (DASFAA'2005) | 04/2004 - 05/2005 | Program Committee Area Chair | | |
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| 10th International Conference on Flood Management | | Scientific Committee member | | |
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| 10th Joint Annual Scientific Meeting, jointly organized by The Hong Kong Society of Gastroenterology, Hong Kong Society of Digestive Endoscopy, Hong Kong Society for Coloproctology, The Hong Kong Association for the Study of Liver Diseases, and The HK Society of Gastrointestinal Motility | 2008 | Chairman of organizing committee | | |
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| 11th Joint Annual Scientific Meeting, jointly organized by The Hong Kong Society of Gastroenterology, Hong Kong Society of Digestive Endoscopy, Hong Kong Society for Coloproctology, The Hong Kong Association for the Study of Liver Diseases, and The HK Society of Gastrointestinal Motility | 11/2008 | Chairman of organizing committee | | |
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| 12th Asian & Oceanian Congress of Child Neurology, Riyadh, Saudi Arabia | 2013 | Member, Scientific Committee | | |
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| 12th Eurasia Conference on Chemical Sciences | 07/2011- | Member of international advisory committee | | |
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| 12th ISBAB, Hong Kong (17-19 Oct 2016) | |
| 13th Advance in Neuroblastoma Research 2008, Chiba, Japan, May 22-25, 2008 | |
| 13th Joint MMM-Intermag Conference, San Diego, USA | 2015-2016 | Program Committee | | |
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| 14th Asian & Oceanian Congress of Neurology (AOCN) | 2014 Mar | Session Chairpersion | | |
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| 14th Scientific Conference of Thai Neuroscience | 2/2010 | International Advisory Committee Member | | |
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| 15t International Symposium on Toxicity Assessment | 01/2010 - 07/2011 | Organizing committee member | | |
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| 15th SNIP (Society on NeuroImmune Pharmacology) Annual Conference | 06/2008 - 04/2009 | Steering Committee Member | | |
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| 16th Annual Scientific Meeting, HKSEMR | 09/2004-11/2004 | Organizing Committee | | |
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| 16th Biannual Conference of International Academy of Periodontology ((Session 4), Brasov, Romania. | |
| 16th International Symposium on Ostracoda | 2009 | Member of scientific committee | | |
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| 17th International Conference on Oral Chelator, Shenzhen, China, Nov 23-27, 2007 | 2007 | Scientific Committee Member | | |
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