The purpose of this observational study is to evaluate the safety and performance of the easyEndoTM Lite Linear Cutting Stapler and staggered design Loading Unit from EziSurg Medical in gastrointestinal surgery. The goal of the study will be achieved by assessing the device performance and reporting of peri- and postoperative complications retrospectively.

Inclusion Criteria:

• Age at study entry is at least 18 years.
• The operation involves the application of easyEndoTM Lite Stapler and Loading Unit for tissue cutting and suturing.

Exclusion Criteria:

• Pregnancy.
• Emergency operation (such as acute intestinal obstruction and gastrointestinal perforation).
• Assessed by the investigator, whose condition is poor and cannot tolerate the surgery.
• History of gastrointestinal surgery.