I have to admit that the days between the ages of 15 and 20 are the most youthful days. 20-30 Years old is the fastest time. The past that a person misses is your childhood, your hazy high school or your college days, whether it is the people who accompanied you or the things you have experienced. There is a saying that "grasp youth", but what have you experienced in your best years, and what have you achieved now? Just like when walking up the stairs, if you want to snow, two squares will be missed and one will be empty. Not everything can have the best of both worlds. Smile and give this period of time the gentlest hug.