The Chinese Journal of Oncology published the paper "Analysis of the Prevalence of Malignant Tumors in China in 29" Lung cancer ranks first in all regions except the Tibet Autonomous Region, Gansu Province and Qinghai Province. Nasopharyngeal carcinoma ranks in the top 10 in Guangdong Province.
Gastric cancer is closely related to Helicobacter pylori infection and dietary habits. Colorectal cancer is associated with excessive meat intake, obesity, and lack of exercise.