Youth

Youth is the most precious time of our life. It is like the beautiful a wonderful dream at of last night; like the cheerful stream running coursing down in the valley; like the colorful rainbow hanging on in the sky or like the lotus blossoming lotus exuding its fragrance. and giving out fragrant smell however mo

No matter how beautiful wonderful the dream is, you will wake up as soon as the sun is rising it disappears upon wakening; no matter how clear cheerful the stream may be is ,it will dry up in the distance mingled into the ocean; no matter how charming the rainbow is, it will disappear in a short while and no matter how gorgeous the flower is, it will fade once it has out spent its time. after the autumn

All the precious is hard to be permanent just like the youth will leave us easily No such thing is there an unending feast or party 1, Youth too will soon take its leave. Chase not of things that we had lost.  We only stumbled into pain and failure.so we chase after him in order to get ride of blankness and loneness. In the process of getting it back , We are gonna be hurt we are gonna be fail we are gonna lost something of ourselves we will be stumbled on stones. we will be puzzled at the cross of the life road we will be regret to make a wrong choice we will be exhausted and trying to give up At the crossroads of our life, fret not about the regrets of wrong choices we may make.  Too much time is spent on worrying when Youth is leaving us.  Instead, cherish of the good times that we have together.  Youth may be fleeting but memory is our companion who leave us not.

Good advice.  However, I am not too sure if my guess is correct.  If you are trying to write higher forms of creative writing, it is best if you have your original Chinese version with you.  It will be easier for those who are bilingual can help you better express yourself in English.

We spent a lot of time to worry about the leaving of the youth
But we forget to cherish the thing it leaved to us .that is memory.
Although the time of the youth is short the memory will last long

1.  Borrowing from a Chinese phrase, 天下無不散宴席 since your piece is filled with Chinese tainted imagery.

Your punctuation spacing is atrocious.  See http://www.italki.com/knowledge/page/Mechanics%20Of%20The%20English%20Language.htm