Suggestion before suicide
I have a dream, where I am the King of liberty, where all the difficulties in reality could be settled down by me, and all the people around could understand me spiritually. In other words, my dream is a world full of harmonies, but without conflicts. In fact everyone knows that it is unrealizable.
Everyone in the world needs almost the same things, as far as I know, which make the society become more and more competitive. In order to live, basic foods, drink and residence are necessary. Suppose that foods and drink are abundant in your big house, you might begin to think about the other half of your body. And the latter will naturally lead to a lot of kids for you to look after.
To raise those little ones is not an easy question. One must at least both physically and economically be free. Doubtlessly it will take off most of your time. In this process, we definitely would encounter thousands problems of different kinds and levels. Day by day, we will feel tired not only physically but also mentally. Anxiety about the future, disappointment towards people around you, disagreement with people in the work…
Now you know why some famous figures committed suicide eventually. Before the critical moment, I think the might had a dream the same as me. But in that dream they didn’t find any solutions but suicide. Whether it is their destiny, I am not sure. This kind of feeling especially is tragical for those who do not have a belief to rely on.
My suggestion to them is that you should in no way rush to end your life without reasons. However hard your feeling is, your existence, your thoughts deserve respect. If you have no one to trust, trust yourself. You’ll certainly get through it in the long run. Once you get through it, you'll draw from a lesson afterwards that your existence is your power source.

"One must at least both physically and economically be free." consider revising this sentence.

First,the article is titled,"Suggestion before suicide", But you only talk about suggestion in the last paragraph, and the rest of the article is not about suggestions for suicide. You may just change the title to "a dream before suicide", as most of the article is about the dream.

Second, you envision a blissful dream that accounts for half the length of the article. When I read about the dream, I wasn't able to relate anything in your dream with suicide. If you want to talk about suicide, give us some horrendous dreams. And if you want to keep the dream, then you have to do some revising. Rather than something like "But in that dream they didn’t find any solutions but suicide", you should have something like, "They think the only way to terminate the cruel reality and pursue the unrealistic joyous dream is to commit suicide".
Namely, if you want to talk about the happy dream, keep it happy.

Third,consider revising the "having kids" section of the article, as it's not very cogent.

Overall, the article does show that you have a good command of English. There are not many grammatical errors and Chinese English that hinder comprehension.