1. Have other cancer history;

2. Patients who have received invasive treatment within the past three months;

3. Inflammatory bowel disease such as ulcerative colitis or crohn's disease;

4. Combined with intestinal obstruction or intestinal perforation for emergency surgery;

5. Psychiatric history, can not join and standardize the completion of clinical investigators;

6. Pregnant or nursing women;

7. Patients treated with antibiotics or microbiological agents one week before surgery;

8. People have incomplete data;

Characteristics of Gut Microbiota in Patients With Colon Cancer of Different Traditional Chinese Medicine Syndromes