Lalalala... 哗啦啦是一种声音 "Hualala"is the voice of rain 内心喜悦的声音however it's the voice showing the huge happiness of my heart 为什么会这么喜悦 why did i say that? 当然有它的原因 of course has the reasons 开心的人说：“ man usually felt happy said:" 开心是容易的事情”Happiness is a easy thing" 忧伤的人说：“ man ususally felt unhappy said:" 开心是不容易的事情”Happiness is a uneasy thing" 有何种感觉 But, which feeling do you feel? 在乎你自己 the key is which choice u pick.