27 Years old, the legendary stage of running into the ranks of leftover women. Xia Yan began to believe that if love is a journey that always goes through the four seasons, perhaps ambiguity is in spring, love is in summer, and love is in autumn, so before winter comes, it will either come to fruition smoothly, or it will only wither and fall. Just like the love in adulthood, no matter how beautiful it is, may still not be as good as the secret love in youth, just like the flying bird seems to never be able to cross the entire Pacific alone, just like the ice cream in winter can be bought if you want to eat it, just like the separation at the end of the beginning of being together, Fang Zhan's lonely back at the Tianhe Airport in the snowy sea that year, so clearly told her what separation and going away, isolated islands and broken walls, what is the end of the world without a word, the love sent by wild geese.