Study of HMPL-760 Plus R-GemOx Versus Placebo Plus R-GemOx in Relapsed/Refractory DLBCL

Inclusion Criteria:

1. Sign the Informed consent form(ICF) and be able to follow the requirements of study protocol;
2. Age ≥18 years;
3. Eastern Cooperative Oncology Group (ECOG) performance status between 0 and 2;
4. Histopathologically confirmed diagnosis of DLBCL;
5. The investigator judges that the patient's current condition requires further treatment;
6. Patients should have at least one bi-dimensionally measurable lesion;
7. Expected survival is more than 12 weeks;

Exclusion Criteria:

1. Patients with known primary or secondary central nervous system lymphoma (CNSL) or the presence of clinical symptoms suggestive of CNSL;
2. Women who are pregnant (positive pregnancy test during the screening period) or breastfeeding;
3. Organ insufficiency;
4. Currently known history of liver disease, including cirrhosis, alcoholic liver, known active infection with human immunodeficiency virus (HIV), hepatitis B virus (HBV), or hepatitis C virus (HCV):
5. History of significant organ bleeding, including gastrointestinal bleeding, hematencephalon, haemoptysis, etc., within 8 weeks prior to the first dose of study drug;
6. Known risk of bleeding, such as coagulation factor deficiency, vascular hemophilia; or the patient is receiving vitamin K antagonist (warfarin);
7. Toxicities from prior anticancer therapy not resolved to Grade ≤ 1 (except for alopecia and decreased appetite);
8. Clinically significant active infection;