This study was designed as a randomized clinical trial comparing the totally laparoscopic distal gastrectomy with laparoscopy-assisted distal gastroectomy for patients with gastric cancer, in terms of short-term and long-term outcomes.

When one patient was enrolled, he will be randomly divided into experimental group (totally laparoscopic distal gastrectomy) or control group (laparoscopy-assisted distal gastrectomy). When he receives surgery, intraoperative parameters would be recorded. when the patient discharges, the routine follow-up would be regularly performed for the survival.

Inclusion Criteria:

• aged 18-80 years old, no gender limitation;
• primary gastric cancer and planed for distal gastrectomy;

Exclusion Criteria:

• patients with total or proximal gastrectomy;
• patients with distant metastasis.

there is a plan to make individual participant data (IPD) available to other researchers.

the Outcomes Assessor would not know which approach the patient received.