Chia-yi acts for large Canadian corporations in the areas of tax dispute resolution and tax litigation. He combines the use of innovative court procedures with his intimate knowledge of various tax authorities to fashion strategic and effective litigation advice. He has appeared as counsel for corporate clients in the telecommunications, financial services, resources, retail and transportation industries before the Tax Court of Canada, the Federal Court of Appeal, the Ontario Superior Court of Justice and the Ontario Court of Appeal.  

Because of Chia-yi's familiarity with tax issues from the government's perspective, he is often invited to address auditors and appeals officers at their conferences and to make presentations to in-house tax and finance departments of leading corporations in North America. Apart from the significant tax litigation work, he also provides planning advice relating to sales, capital, land transfer and payroll taxes.

Chia-yi regularly addresses the Tax Executives Institute, Inc., and writes for various tax publications including the tax litigation journal on which he sits on the Board of Editors and the CCH Ontario Tax Reporter for which he is the case law contributor.

Chia-yi has been recommended by Chambers Global: The World’s Leading Lawyers for Business 2010, as one of Canada’s leading Tax Litigation lawyers, "praised for his skills in strategy and his ability to explain complex issues to clients" and as acting "for large domestic corporations in tax dispute resolution and litigation". He has also been recognized by LexisNexis Martindale-Hubbell Peer Review Ratings for his highly regarded legal skills and professional ethics and is recognized as one of Canada's leading tax lawyers in the 2010 edition of Best Lawyers in Canada.