Hainan Sirius Acquisition Corp. is a blank check company incorporated as a Cayman Islands exempted company and formed for the purpose of effecting a merger, share exchange, asset acquisition, share purchase, reorganization or similar business combination with one or more businesses, which we refer to throughout this prospectus as our initial business combination. We have not selected any specific business combination target and we have not, nor has anyone on our behalf, initiated any substantive discussions, directly or indirectly, with any business combination target. We will not consider or undertake an initial business combination with any target company, the financial statements of which are audited by an accounting firm that the United States Public Accounting Oversight Board (“PCAOB”) has identified in the Determination Report described below or that it has otherwise been unable to inspect for two consecutive years.