Methods Professionals were selected by stratified and random sampling.

Objective: To describe the physical activity level and its influencing factors of Chinese professionals, to provide basis for developing intervention strategies.

Analysis of death causes and potential years of life lost for the occupational population in Taian city;

Risk of contract with hepatitis E virus in occupational populations;

Follow up study on dynamic change in marks of HBV infection in occupational population;

Knowledge,attitude and behaviors on brucellosis among occupational groups in western Liaoning province

Objective To find out the subhealthy state and risk factors in the occupational groups of teachers, aluminous workers and people in road-maintaining in order to offer the scientific evidence for adopting the countermeasures.

Objective: To study health effect of occupational group exposed to terephthalic acid, ethylene glycol, hydrogenated terphenyls, and research for the precautionary measures of third-level prevention.

Success in adopting multiple models to promote behavioral change among MSM in China.;

Objective To examine the correlation between high risk behavior and the prevalence of STD/HIV among men who have sex with men(MSM), and to provide the scientific evidence for developing of intervention strategy targeting MSM.