BEIJING – Suzhou-based Alphamab Oncology Co. Ltd. (HK:9966), which aims to bring the first PD-L1/CTLA4 bispecific antibody to China, saw its share prices jump almost 30% on its debut on the Hong Kong Stock Exchange (HKEX) on Dec. 12, 2019, ending the year on a positive note for the pre-revenue biotech.