| KPMG (China) | 26-Jun-26 | | | |
| KPMG (China) | 17-May-26 | | | |
| Deloitte | | 26-Jun-26 | | The same auditor’s consecutive term of service for the annual audit of a state-owned enterprise shall not exceed 5 years. Deloitte Touche Tohmatsu was appointed from the year 2021. |
| Deloitte | 17-May-21 | 17-May-26 | | Pursuant to the requirements of the relevant state-owned assets supervisory authorities, the same auditor's consecutive term of service for the annual audit of an enterprise shall not exceed 5 years. Where consecutive audit service exceeds 5 years, a rotation must be carried out. |
| Ernst & Young (China) | 24-Jun-16 | 17-May-21 | | Historical transition (details not available in archive) |
| PwC (China) | 17-May-11 | 24-Jun-16 | | Historical transition (details not available in archive) |
| PwC (HK) | 19-Mar-99 | 17-May-11 | | Historical transition (details not available in archive) |
| PwC (HK) | 04-Mar-97 | 19-Mar-99 | | Historical transition (details not available in archive) |
