1. company annual report: you can view the annual report published by the company, including the company's financial data, including the loss data of previous years. The annual report can be found on the company's official website or the website of the stock exchange.
2. SEHK website: SEHK official website provides financial information of listed companies, and the company's financial reports, including loss data of previous years, can be found on the website.
3. Website of government agencies: Government agencies, such as the tax bureau and the Ministry of Finance, will publish the financial data of enterprises in official website. Visit these websites to find the loss data of previous years.