According to a recent study of more than 17,000 chinese 11- to 22-year-olds, males in china have a higher rate of depression than females because:

Because "the males have stressful life events in addition to less coping style".

Depression is a typical and serious medicinal disease that adversely influences how an individual feels, the way s/he thinks and how they act. Luckily, it is additionally treatable. Depression causes sentiments of bitterness or potentially lost enthusiasm for exercises once delighted in.  

b) to encourage free trade