The mental health problems might have been increased owing to the COVID-19 pandemic with the commencement of the year 2020, therefore, an epidemiological survey appraising the burden of mental health issues among the general population is imperative . This cross-sectional study attempts to reveal the underlying mental health conditions, such as Post-Traumatic Stress Symptoms (PTSS), depression, and insomnia, relating to the pandemic situation, and to further examine the combined effects of gender and age on the COVID-19 related mental health consequences . An online survey was conducted among 2,992 adults in China from February 1st 2020 to February 10th 2020 . The study uses binary logistic regression to analyze the potential factors associated with PTSD, depression, and insomnia . The results indicate that the prevalence of PTSS, depression, and insomnia are 19.5 , 26.9, and 19.6% respectively during the COVID-19 . Men and women show different rates of PTSS and depression, whereas no insomnia is found in both males and females . The females above 50 years of age have a lower level of depressive symptoms (OR = 0.448 , 95% CI : 0.220-0.911, Cohen's d = -0.443) as compared with females aged 18-25; while the highest effect sizes for PTSS (OR = 2.846 , 95% CI : 1.725-4.695, Cohen's d = 0.537) and the depression (OR = 2.024 , 95% CI : 1.317-3.111, Cohen's d = 0.314) are seen in males aged 26 to 30 . Besides gender, education, living conditions, direct exposure to COVID-19, the post mental and the physical health condition is related to PTSS, depression, and insomnia . Our study suggests that high-risk groups, especially those having two or more related factors and young men, should be the focus of mental health intervention.