In this hot summer, Pan and Corrine's second travel is going to a cool place, the Double Dragon Cave in the North Mountain, where the annual temperature is just 17 degrees.  Follow them for a cool summer!

烈日炎炎，小潘和小卫的第二次旅行选择在常年温度17度左右的金华双龙洞，跟着她们一起清凉一夏吧！