Randomized, double-blind, placebo-controlled study to evaluate the efficacy and safety of Hetrombopag in subjects with chemotherapy-induced thrombocytopenia receiving chemotherapy for the treatment of solid tumors.

Inclusion Criteria:

1. Men and women, 18-75 years of age;
2. Participant with a confirmed diagnosis of solid tumor receiving a chemotherapy regimen;
3. Participant experienced thrombocytopenia and chemotherapy delay;
4. ECOG performance status 0-1;

Exclusion Criteria:

1. Screening and baseline platelet count< 30×109/L;
2. Participant has experienced thrombocytopenia due to any etiology other than chemotherapy within 6 months of screening;
3. Participant has any history of hematologic diseases other than chemotherapy-induced thrombocytopenia;
4. Participant has serious bleeding symptoms;
5. Participant has no hepatic metastases, ALT/AST>3ULN, TBIL>3ULN; with hepatic metastases, ALT/AST≥5ULN, TBIL≥5ULN;
6. Blood Cr≥1.5ULN or eGFR≤60 ml/min（Cockcroft-Gault）;
7. History of allergy to the study drug;
8. Participant with HIV;
9. Pregnant or lactating women;
10. Other conditions that may affect participant's safety or trial evaluations per investigator's discretion