According to QQ music query, we know that just learning how to grow old is the lyrics of the song "Growing Old in an Instant". The original singer is Uncle Qiu, and the release date is 20 17-09-20. Word: Gao Yu, Qu: Chen Wei, so it is "old in a flash".

Some lyrics of "Growing Old in an Instant" are as follows: I just learned how to grow old, and I just learned how to grow old with tolerance. I only know where to go, and I'm old before I get there. How old you are at the beginning of maturity, how old you are at the beginning of understanding.