That song is called "Always Here". It is a song written by Lin Sheng for the mountains, the forest ranger station, and all the lives that have accompanied him in those years. It is also written for Gu Qingxi - the lyrics include mountain mornings, pine breeze, and a pair of eyes that "focus the camera on the world, But I pointed the light of the whole world at you." There are the crooked words of Niu Niu, the unfolded carapace of the ball, the look of Xiao Jin looking back, the candles on the night of the typhoon, and the way Gu Qingxi held the camera in the yard and waited for the morning when he first came.