"What passes are old friends, what remains is old wine." What does this sentence mean?

Old friends are like old wine, the longer it gets, the mellower it gets\x0d\Old wine, the mellow aroma of the wine makes people drunk even through the packaging;\x0d\Old wine is not necessarily a good wine;\x0d\Old wine An old friend must be a friend who has experienced life and tasted life;\x0d\There is a kind of longing that may be the person you passed by, that is love;\x0d\There is a kind of longing that will sink in the memory for a long time, that is old age Friends;\x0d\Love will make people get lost and wander;\x0d\And old friends, just like the fragrance of wine that has been collected for many years, will become more cherished and more mellow. \x0d\Reminiscent of when we were young, we used to be young together and didn’t know what it was like to be sad;\x0d\We held candles together and talked about life and ideals, and we cried and laughed together to face the confusion of life;\x0d\Now we are carefree together, and the days are full of stars. It’s no longer coming back;\x0d\Time makes us grow older together,\x0d\I think back then a bottle of low-quality wine and a few not-so-palatable side dishes were enough for us to share the joys and sorrows of life,\x0d\It was enough for us to We've been drunk together,\x0d\The rushing years have made us, who were young people who didn't know the taste of sorrow, become deeper,\x0d\become mature and capable. Maybe you have alienated your old friends intentionally or unintentionally; but in the end, When you feel lonely and helpless, it is the thoughts of old friends and the distant Feihong that affect your thoughts; \x0d\ Give you sincere care and selfless comfort, making your heart beat; \x0d\ Friendship is like Wine opens the window to our souls;\x0d\Like the friendship of wine, it accompanies us through the ups and downs of life. \x0d\Old wine makes people miss the old friends who were once drunk;\x0d\Old friends share old wine together, share the suffering life together,\x0d\share the joy of success together, and share the rare drunkenness together That leisurely feeling;\x0d\Let us cherish what we have and let everything flow with the wind...\x0d\Cherish the old wine;\x0d\Cherish the old friends!