There was no computer at the checkout counter because his parents did not really know how to operate the computer. They are accustomed to using paper notes and did not want to spend extra money to hire people. There were only WeChat and Alipay QR codes available. He suddenly hesitated. There was an inexplicable sense of disobedience in his heart from watching other people's lives through the glass screen. His mother, who was talking to the customer, turned her eyes and saw him standing outside the door. She pleasantly gestured for him to hurry in. His hesitation was instantly defeated. It was as if he could not resist and subconsciously pushed open the door. "You are back? Are you tired from traveling on the train? Go upstairs and go take a break." His mother smiled and looked at him from head to toe. It was not the professional smile given when facing customers. It was the smile that said, "I have a customer here. I can't talk more now." "Go upstairs. I will cook in a while." His father held a small shovel to clean up the pet droppings. He stood up, stretched himself, and hit his own back. He could see it clearly. The white hair on his mother's head, their overworked and chapped hands, and the wrinkles of the father's forehead. There was also their familiar voices and joyful eyes... So real, so...nostalgic.