Why is it that young people often appear in the park at night with a high-powered stereo hi song?

This and a lot of moncler jackets outlet square dancing is a similar situation, because the pressure of life is not small, but also in the night to relax, through the high power, can make the singing more into the mood it, but also want to infect more people through the song, of course, if there is a nuisance phenomenon, in fact, it's not very good, I feel that if it is a high-powered, inevitably also interfere with the park inside! Other rest and recreation of people, which is actually not too good.