This trial is designed to first include 6 subjects to confirm the dose safety. If the toxicity is intolerable, the dose of chemotherapeutic drugs will be reduced depending on the toxicity for further exploration.If it was tolerated, the recommended dose was determined, and the dose was extended. 14 patients were enrolled to further observe the safety and efficacy.
To evaluate the safety and efficacy of recombinant anti-PD-L1 monoclonal antibody injection (ZKAB001) combined with Albumin-bound paclitaxel in the treatment of Advanced urothelial carcinoma