Being 18, permanently?

What did u look like when u were at the age of 18? There must have been a piece of beautiful memory at that young age. Lately, it has become a craze for youngsters to post two their own pictures of on the Wechat Moments: one was taken at 18 and the other taken recently.

It is said that the trend rises because the youngest of post-1990s generation (who were considered as children) became adults this year. But whatever the reasons are, people all want to memorize the old good days at their age of 18. 

So, how to stay young permanently? Always be young at heart.