Start your search for company information on the company's website.
For a public company its website may contain annual and interim reports with details of company activities and financial information. To locate annual/interim reports look for links such as Investor Relations (投資者關係) or Investors (投資者).
For a private company, its web site is generally used to sell its products and/or services but some contact information may be available.
For more company information, refer to the tabs on the left of screen.