Xiang Nan's diary is actually just an ordinary notebook. It doesn't have the function of making wishes come true after writing them down. It was just given this special super power in a dream to promote the development of the plot. Xiang Nan wants to make friends. This process is full of twists and turns, including his own personality problems and external factors, but the ending is good. This part probably wants to tell us that you cannot use any means to make friends. Only sincerity can impress the other person. Friends do not depend on their status. Those who treat you sincerely are true friends.