Walvax Biotechnology Co. Ltd. (SZ:300142) raised an additional ¥450 million (US$73 million) through a private placement. The private placement of 15 million shares will be offered to Li Yunchun, one of Walvax's major shareholders, as well as investment companies Yuxi Gaoxin Private Capital Management, Shenzhen Deruntianqing Investment Management Partnership and Yuxi Runtai Investment Management Partnership.