那段青春不荒唐那场爱情不受伤
[nèi duàn qīng chūn bù huāng táng nèi chăng ài qíng bù shòu shāng]
'Na duan qingchun bu hangtang na chang aiqu bu shangshang' can be interpreted as 'That youth wasn't wild, that love didn’t hurt,’ indicating nostalgia for a period of youth spent wisely without regret and an innocent love free from heartache.