Study of ZGGS18 in Patients With Advanced Solid Tumors

0.3 mg/kg, 1 mg/kg, 3 mg/kg, 6 mg/kg, 10 mg/kg, 15 mg/kg and 20 mg/kgof ZGGS18，intravenous infusion, once every 2 weeks.

Recommended Phase 2 Dose (RP2D) (to be determined) of ZGGS18，intravenous infusion, once every 2 weeks.