On July 25, 2022, PetroVietNam Drilling & Well Service Corporation (stock code: PVD) signed an audit contract with the branch of Deloitte Vietnam Company Limited regarding the provision of services of review of financial statements of PetroVietNam Drilling & Well Service Corporation for the accounting period from 01/01/2022 to 06/30/2022 and audit of financial statements of PetroVietNam Drilling & Well Service Corporation for the fiscal year ended on 12/31/2022.