Separate laws and systems regulate the registration of company names, business names, and trade marks in Hong Kong and Singapore.
A company name registration at the Companies Registry/Accounting and Corporate Regulatory Authority (ACRA) or a business name registration at the Business Registration Office/BizFile is not the same as a trade mark registration at the Trade Marks Registry/Intellectual Property Office of Singapore. A business or company name registration is not an indication of trade mark rights.
Online and free of charge, you can check registered trade marks, owners, and persons or companies licensed to use the trade marks in Hong Kong here and in Singapore here.