Safety and Efficacy of Ginsenoside Rg3 in Combination with First-line Chemotherapy in Advanced Gastric Cancer.The purpose of this study is to assess the safety of Ginsenoside Rg3 in advanced gastric cancer, and whether it improves the efficacy of first-line chemotherapy.

Inclusion Criteria:

1. Signed informed consent form
2. Performance Status- Eastern Cooperative Oncology Group (ECOG) 0-1;
3. Histologically or cytologically confirmed gastric cancer;
4. At least have one measurable disease(according to RECIST, Response Evaluation Criteria in Solid Tumors )
5. Life expectancy of at least 3 months;

Exclusion Criteria:

1. Received any prior treatment including Ginsenoside Rg3;
2. Active or uncontrolled infection;
3. Concurrent treatment with an investigational agent or participation in another therapeutic clinical trial;
4. Pregnant or lactating women.