China dials up scrutiny of Big Four audit firms after Evergrande probe, sources say

China's Ministry of Finance is intensifying checks on Big Four auditing firms like Deloitte, EY, PwC, KPMG for local companies. Focus on audits of financial firms and highly leveraged companies. Regulatory probe into intermediaries like auditors following China Evergrande scandal. Increased scrutiny to restore confidence in stock markets and assess financial sector vulnerabilities.