Boston Scientific Corp. offered $523 million in cash for 65% of Acotec Scientific Holdings Ltd., a manufacturer of vascular intervention devices. The acquisition would significantly expand Boston Scientific’s presence in China, which the company expects to account for about 25% of the global med-tech market by the end of the decade. The transaction is expected to close in the first half of 2023, subject to shareholder approval. The offer price of HK$20 or US$2.57 per share represents a premium of more than 31% over its close on Friday, Acotec reported.