Key Inclusion Criteria:  Eastern Cooperative Oncology Group (ECOG) performance status of 0-1 Histological or cytological confirmation of recurrent or refractory advanced solid tumours, and have progressed on standard therapy, or are intolerable for available standard therapy, or there is no available standard therapy. At least one measurable disease for expansion cohorts per Response Evaluation Criteria in Solid Tumours (RECIST) v1.1. Subjects must show appropriate organ and marrow function in laboratory examinations within 7 days prior to the first dose  Key Exclusion Criteria:  Any adverse event from prior anti-tumour therapy has not yet recovered to ≤grade 1 of CTCAE v5.0 Uncontrolled tumour-related pain Known central nervous system (CNS) Uncontrolled pleural effusion, pericardial effusion, or ascites requiring recurrent drainage procedures Use of inhaled corticosteroids Known history of autoimmune disease Use of any live attenuated vaccines within 28 days Have severe cardiovascular disease Uncontrolled or severe illness History of immunodeficiency disease Active malignancies which are likely to require the treatment. Child-bearing potential female Have psychiatric illness or disorders  Note: Other protocol defined Inclusion/Exclusion criteria may apply.