One month before the end of the school year, everyone in the class received a letter, all handwritten and mailed to the department in an envelope, from an old lady. 　　The old lady is an American citizen of Chinese descent, surnamed Liu. I wanted to throw the letter away, but when I saw the photo of the old lady attached to the letter, I couldn’t help but take a second look. 　　In the photo is an old lady with a Chinese face, wearing ordinary clothes, sitting in the background of daily life, not at all like the photos used by actors, and there is no sense of drama at all.…