Chinese heart valve specialist Microport Cardioflow Medtech Corp. (HKEX:2160) launched an IPO in Hong Kong on Feb. 4, raising HK$2.5 billion (US$324 million) by issuing 205.62 million shares at HK$12.20 apiece. With J.P. Morgan, Citi and CICC backing the IPO, the stock opened at HK$21.50, up 76% from the offer price. The pre-revenue med-tech firm, spun off from Microport Scientific Corp. in 2020, develops transcatheter aortic valve implantation (TAVI) products for valvular heart diseases, and is especially known for its Vitaflow series.