In ancient times, people chose the mountain covered with lush trees for cooling off in summer. In his poem "Very Cool in the Mountains in June and July While" , Song Dynasty's Lu You wrote: "It's hot in the city, but cool in the village. Paulownia leaves brush against the windows, and the smell of rice flowers around the house." These lines described how refreshing it was to have a mountain breeze blowing through the pines, making it a great place to escape from the heat.