All the treasures of the earth would not bring back one lost moment.
机会失去不再来，千贯万贯难赎回。
Cherish your human connections, your relationships with friends and family.
要珍惜你与他人之间的纽带，那就是你与家人朋友之间的关系。
As we age, it may be hard to make new friends.
And the most of our time we spend on social connections may be used to maintain the existing relationships.
Don't think such maintainace too hard or too easy.
It will not take you too much time or energy, but you must take it seriously, because all things may be easily destroyed, but difficlutly constructed.