Colon cancer patients' serum 3'sulfo - Lewis a content determination and significance: For the Chinese coastal areas and other parts of China or other countries, the level of other ethnic serum 3sulfo - Lewis is still unknown and requires further experiments or more reports. The test determined that 3sulfo - Lewis’s performance in healthy people and cancer patients, the clinical significance of serum levels is not the same, and we will have another paper report to assess its clinical significance. As for other diseases other than tumors, they were not included in the consideration of this test, and the relationship with diseases other than the tumor is completely unclear. The authors would like to thank Zhongshan Hospital, Fudan University, and the Affiliated Tumor Hospital of Wenzhou Medical College for providing part of the specimens.