Seven years ago in 2012, around this time of year, for two consecutive months, I went to the Han and Tang Bookstore in Xiaozhai every day, staying there for half a day, and every half an hour before closing. , this melody will sound every time. I never know the name, but I can’t forget it once I hear it. I heard this background music again in a short video a few days ago. I was inexplicably excited and searched hard for it. It turned out to be Yanni's "Heart Orchid Follows"