I Don't Know How to Say It

Xu Nuo is in the same class as Chen Jiajun in elementary school and in the same junior high school. —— During the years he sat behind her, his pen poked her shoulder with just the right amount of force. Like him, he was always measured. In the third year of junior high school, he took the exam and went to another place. He walked so fast that he didn't even have time to say "I'm leaving" - or in other words, he didn't know how to say it. Later, Xu Nuo sat on his empty seat for a while, said nothing, stood up and left. Two years later, at the end of the first semester of his sophomore year in high school, Chen Jiajun came back. —— At the temple fair in Qiwu Mountain, they met head-on on the stone steps halfway up the mountain. She was panting with her hands on her knees, and her hair was messed up by the wind. He was standing a few steps away with a very calm expression, as if he was just passing by to buy a bottle of water from the canteen. Xu Nuo straightened up and walked past him without looking back. She didn't ask "Why did you leave in the first place", and he didn't explain "Why I came back". But from then on, he never got too close or went too far. She would only say softly when she passed by: "Be careful when going down the mountain." They have known each other for many years. They know each other better than anyone else, but they are also stranger than anyone else. —— They walked up and down that stone staircase many times. It was very noisy in summer and the cicadas chirped so long that neither of them knew how to speak. But this time, they didn't want to pretend to be passing by. Intent: About the reunion after "goodbye without saying goodbye". Two people who grew up together got separated and returned to the same place. This time, they need to learn to speak properly.