What is the name of the song sung by pineapple blowing snow as Santa Claus to pineapple Wei?

In a blink of an eye, many years have passed, and many joys and sorrows have become potbellies. The young people in the past were very attractive and always unforgettable. Now they have white hair. Do you remember me, the person I loved, where are you now, and anyone who loved me? Do you still remember me Youth is like running water, it is too late to say goodbye, leaving only numbness. Adapted from old boys