ZG006 and ZG005 in Participants With Small Cell Lung Cancer or Neuroendocrine Carcinoma

This study tests two investigational drugs — ZG006 and ZG005 — in patients with advanced small cell lung cancer or neuroendocrine carcinoma (a type of cancer that develops from hormone-producing cells), cancers that are difficult to treat after standard therapies fail. **You may be eligible if...** - You are between 18 and 70 years old - You have confirmed advanced small cell lung cancer or neuroendocrine carcinoma - Your cancer has progressed after standard treatment - Your general health is adequate for receiving treatment (ECOG performance status within range) **You may NOT be eligible if...** - You have uncontrolled brain metastases - You have serious heart, kidney, or liver problems - You have had certain prior immune checkpoint therapies Talk to your doctor to see if this trial is right for you.