Where Does the City Gate Open?

We met in this city, and we laughed and felt sad. When I was discouraged, I had your encouragement. When I was at a loss, I had you by my side. In the sea of ​​people, I was ups and downs, but I finally forgot which way the city gate opened. Fortunately, you were there. This is a small story about a small person, recalling those untraceable youth. (Everyone is the protagonist of their own life, don't be discouraged, don't be discouraged, what you don't like is exactly what others envy)