The purpose of this study is to assess the relationship of pCR rate and efficacy by comparing the two drugs and three drugs as neoadjuvant chemotherapy in advanced gastric cancer patients.

Eligible patients will be randomly assigned by a randomisation system in a 1:1:1 ratio to three group. The group A wil receive four cycles of DOX (docetaxel 60mg/m2 on day 1,oxaliplatin 130mg/m2 on day 1 and capecitabine 1,000 mg/m2 per day on days 1 to 14, repeated every 3 weeks) as neoadjuvant therapy and four cycles of Xelox (capecitabine 1,000 mg/m2 per day on days 1 to 14 and oxaliplatin 130mg/m2 on day 1, repeated every 3 weeks) as adjuvant therapy.The group B wil receive four cycles of Xelox (capecitabine 1,000 mg/m2 per day on days 1 to 14 and oxaliplatin 130mg/m2 on day 1, repeated every 3 weeks) as neoadjuvant therapy and four cycles of Xelox as adjuvant therapy.The group C wil receive eight cycles of Xelox (capecitabine 1,000 mg/m2 per day on days 1 to 14 and oxaliplatin 130mg/m2 on day 1, repeated every 3 weeks) as adjuvant therapy.

Inclusion Criteria:

1. Histologically or cytologically proven in operable advanced gastric adenocarcinoma;

2. Subjects who were identified as potentially resectable cases by a multidisciplinary consultation;

3. KPS> 80; ECOG score: 0-1;

4. Expected survival> 6 months;

5. Age 20 -60;

6. Major organ function has to meet the following criteria:

   Neutrophil count ≥1.5 × 109 / L, platelet count ≥100 × 109 / L, Hemoglobin ≥90g / L, liver function <1.5 times the upper limit of normal, serum bilirubin ≤1.0 × UNL, serum creatinine <1.5 × UNL, PT-INR / PTT <1.7 times the upper limit of normal;

7. Subjects has to voluntarily join the study and sign the Informed Consent Form for the study;

Exclusion Criteria:

1. Associated with serious diseases in liver ,kidney, cardiovascular system and other vital organs;
2. History of hypersensitivity to docetaxel, capecitabine, oxaliplatin or the ingredients of this product;
3. Receiving any form of chemotherapy or other study medication;
4. Pregnancy or lactation women, or women with suspected pregnancy or men unless using a reliable and appropriate contraceptive method;
5. Associated with inability to swallow, haemorrhagic peptic ulcer, mechanical or paralytic ileus, gastrointestinal active bleeding.