The purpose of the study is to evaluate the safety and tolerability of HLX60 combined with HLX10 in order to determine the maximum tolerated dose (MTD) and Recommended Phase 2 dose (RP2D) and to evaluate the preliminary efficacy for each combination regimen.

Accelerated titration and "3 + 3" dose escalation were used in this trial . various doses of HLX60(anti-GARP) combined with HLX10(anti-PD-1) by intravenous infusion.

Inclusion Criteria:

• Patients with histologically or cytologically confirmed advanced malignant solid tumor, who have failed or cannot receive the standard treatment;
• With at least one evaluable lesion according to RECIST v1.1 (for solid tumors);
• Patients must be able to supply adequate tumor tissue for biomarker (including the expression of PD-L1, GARP) analyses;
• Life expectancy longer than three months;
• Participant has an Eastern Cooperative Oncology Group (ECOG) Performance Status of 0 to 1.

Exclusion Criteria:

• Has a concurrently active second malignancy, other than adequately treated non-melanoma skin cancers, in situ melanoma or in situ cervical cancer. Participants with history of the second malignancy have been disease-free for <3 years.
• Has a history of (non-infectious) interstitial lung disease (ILD) that required steroids, currently has ILD, or when suspected ILD cannot be ruled out by imaging at screening.
• Participant has unresolved AEs ≥ Grade 2 from prior anticancer therapy except for alopecia.
• Those who have received anti-GARP or anti-GARP/TGFβ complex antibody therapy.