A review of blinded interim PK data will be conducted by the Safety Review Committee (SRC) to confirm the study sampling schedule captures the full PK profile of SHR-1314. This interim analysis will be conducted for Cohort 1 and may be conducted for subsequent cohorts if serum SHR-1314 concentrations in Cohort 1 or any of the subsequent cohorts are below the limit of quantification of the assay preventing evaluation of the PK profile.