Exploratory Study on the S-1 + Paclitaxel Chemotherapy for Unresectable Gastric Cancer

Inclusion Criteria:

-Unresectable gastric cancer as proven histologically (AJCC, Version 7) under any following condition: Unable radical excision due to the local metastasis or invasion Metastasis to the lymph node beside the abdominal aorta Non-extensive metastasis to liver (not more than three metastatic foci of radical excision)

* Definitely diagnosed as above stage of stomach cancer before the operation via CT or MRI, ultrasonic endoscopy and blood tumor antigen test, or through the laparoscopy if necessary
* Untreated (e.g. radiotherapy, chemotherapy, target therapy and immunotherapy)
* ECOG (Eastern Cooperative Oncology Group) : 0\~2
* Age: 18\~75 years old
* Normal hemodynamic indices before the recruitment (including blood cell count and liver/kidney function). For example: WBC\>4.0×109/L, NEU \>1.5×109/L, PLT\>100×109/L, BIL\<1.5 times of upper limit of normal reference value, ALT and AST\<2.5 times of upper limit of normal reference value, and CRE\<1.2mg/dl
* Good cardiac function before the recruitment, no seizure of myocardial infarction in past half year, and controllable hypertension and other coronary heart diseases
* Not concomitant with other uncontrollable benign diseases before the recruitment (e.g. the infection in the lung, kidney and liver)
* Not participating in other study projects before and during the treatment
* Signed the Informed Consent Form

Exclusion Criteria:

* Not conforming to above inclusion criteria
* Distal metastasis to lung, brain and bone (except the liver)
* Ever operation on the stomach
* Operation intolerance due to other systemic basic diseases
* Ever administered other drugs (including TCM drugs) before the recruitment, or no guarantee of progress according to the study requirement after the recruitment
* Allergy to the drugs in this protocol
* Pregnant or lactating women
* Women at childbearing age and of pregnancy desire during the study