7月21日电，正荣地产在港交所公告，安永辞任公司核数师。

Group 1 - The core point of the article is that Zhengrong Real Estate announced the resignation of its auditor, Ernst & Young, in a notice to the Hong Kong Stock Exchange [1] Group 2 - The announcement indicates a significant change in the company's auditing process, which may impact investor confidence and perceptions of corporate governance [1] - The resignation of a major auditing firm like Ernst & Young could lead to increased scrutiny from regulators and stakeholders regarding the company's financial practices [1] - This development may also affect the company's future financial reporting and transparency, as a new auditor will need to be appointed [1]