Pay attention to rest, combine work and rest, and participate in appropriate physical exercise. Avoid fried and pickled foods, quit smoking and alcohol. Treatment: choose a treatment plan according to your condition; also administer immune boosting treatment (herbs and/or immune modulators). Regular review: every 3~4 months for 3 years, every 6 months for 3~5 years, and every 1 year thereafter; items include lung-enhanced CT, bone scan, brain MRI, abdominal ultrasound (CT if necessary), tumor markers (squamous carcinoma CEA, SCC; adenocarcinoma CEA, CA199, CA125; small cell carcinoma CEA, NSE), electrocardiogram, biochemical tests, blood, urine and stool routine.