This is a multi-center, open-label, Phase I/II clinical study of YL205. This study includes: Phase I dose escalation and backfill, and Phase II dose expansion. It is to evaluate the safety and tolerability of YL205 in patients with advanced solid tumors who have experienced treatment failure of existing standard therapies, have no standard treatment options, are currently not suitable for standard treatments, or cannot benefit from other approved therapies in dose escalation, and will backfill patients in certain tolerable dose levels to further evaluate the efficacy and safety of YL205.

To evaluate the safety and tolerability of IM-1021 in participants with advanced lymphomas and advanced solid tumors. To determine the recommended dose(s) and schedule(s) of IM-1021 for further development.