This study looked at how well auditors ensure the financial statements of companies are accurate. They checked if Big 4 auditors do a better job than others in Hong Kong. By examining the quality of audit work on financial reports, they found that Big 4 auditors generally provide higher quality audits compared to non-Big 4 firms. The research also discovered that even though audit reports said everything was okay, some financial information was not up to standard, especially in checking impairments according to financial rules. So, even with clean audit reports, it's important to watch out for potential accuracy issues in financial statements.