Standing on the border of Xiaoxiao Ancient Road, heading west to the end of the world, looking at the misty rain of Hongcheng and the yellow sand of the borderland of Jiangnan beyond the Great Wall. The years as pure as paper and the cheeks as pure as the paper are the clear charm of the past that cannot be looked back. The first time I smoked, the first time I went clubbing, the first time I truly entered this world of intoxication~ And at that time, the familiar faces, the familiar songs that I looked back on countless times in my dreams over the years, forced myself to suppress the covetousness in my heart that I couldn't face, and passed through the calluses of holding steel guns again and again on the border outside the wall. The beautiful circle of smoke when we first met, intoxicated by the tenderness of nature under the dim light, was frozen in the fragmented memories... Just like Hu Xiaoke's tear-stained voice echoed: What you sink into is not the impulse when you first met Liu, but the girl in the KTV who has haunted you for thousands of years. The reason you cry is not because you can't let go, but because you can't face the embarrassment of your true inner feelings. Just like you have been in the loneliness of the northern border for so many years, but your heart is still floating in the songs of Qingshan Lake...