When I first met her, she was a new teacher who was undergoing a nervous interview. She stood on the podium and was trembling slightly when speaking. He was the teacher who was interviewing her. He listened to her carefully, patiently encouraged her, and had a gentle expression. Later, she gradually lost the timidity of a little girl and became a goddess recognized by teachers and students. She is confident, elegant, cute and charming. But he is not good at words, keeps a low profile, works silently, treats students as his own children, and is serious and responsible. They are colleagues and have been together for several years. They are not like old friends. They cooperate well but are distant and not close. They have completely different life rhythms and personalities, but they share the same career pursuits, love for teaching, and responsibility for students. During the decades of being together, we watched each other go through one incident after another, welcoming and sending off successive generations of students. Finally, when she slowly let go of her ex and looked forward, she realized that he was still looking at her tenderly as before, and had been protecting her silently for many years. Fortunately, it's not too late and they still have the rest of their lives.