RecruitingDrug trialTreatment of Chinese Participants With B-Cell Malignancies With BGB-16673, a Bruton Tyrosine Kinase-Targeted Protein-DegraderThis study aims to explore the recommended phase 2 dose and evaluate the safety, tolerability and preliminary antitumor activity of BGB-16673 monotherapy at the recommended Phase 2 dose for the selected B-cell malignancy expansion cohorts