Clinical Research Directory

Key Inclusion Criteria: * 18 years or older, 40kg or heavier * Histologically or cytologically confirmed diagnosis of advanced solid tumor （For phase 1b, patients must have solid tumor with GPC3+ ) * Standard treatment failed or standard treatment intolerant, no standard treatment * Adequate hepatic, hematologic, and renal function Key Exclusion Criteria: * Anti-tumor treatment within 4 weeks prior to the first QLS31903 administration,except a few specific conditions * Other clinical trial within 4 weeks prior to the first QLS31903 administration * Receipt of a live or live attenuated vaccine within 30 days prior to the first QLS31903 administration * Prior treatment targeted on GPC3 * HBsAg/HBcAb positive and HBV-DNA\>10,000 copy/mL;HCV-Ab positive and HCV-RNA\>1,000 copy/mL * CNS metastasis (except asymptomatic brain metastases or symptomatic brain metastases after treatment stable for more than 4 weeks) and/or carcinomatous meningitis or leptomeningeal disease