Red: My corrections

Blue: My comments

My Wonderful Trip

May 1st is labor day.My housemates and I made a boat trip to a tiny island in chongqing,which lasted 3 days.And we had a good time there.

May 1st is Labor Day. My housemates and I made a boat trip to a tiny island in Chonqing and it lasted for 3 days. We had a great time there. 

Not long ago,we decided to go there in practice.

I thought this sentence was not needed. 
Now let me tell you what occured to us,please.First day,we spent aout 3 hours taking the bus to reach the area.And then,we entered the ancient town to have a look.

Now, let me tell you what occurred to us. On the first day, we spent about 3 hours taking the bus to reach the area, then we entered the ancient town to have a look around. 

First of all,I was impressed by its spacious structure.And visitors could see the old train,horses and national clothes.Besides,there were many fresh things that I don't know how to say them to you in English.

I was impressed by the architecture and design. Visitors could see the old trains, horse carriages and national clothing. There were many new things that I don't know how to explain to you in English.

Changed the sentence a little bit to make it sound better and more descriptive. Did you actually see old horses, or did you see horses pulling carriages? When you say "fresh things" the first thing that comes into my mind might be food. I changed it to "new things".  

I just want to say if you were there you should really be likely to love it.To act on our plan,we got up early the next morning.First,we got to the island by boat.

I just wanted to say that if you were there, you will most likely love this place. In order to enjoy our day, we got up early the next morning. We then went to the island by boat. 

I became cheerful at sight of the ZhouEnlai's image.As is known to all,ZhouEnlai was the former prime minister of China.And the Chinese people admired him very much because of his ability.

I was in awe at the sight of Zhou Enlai's image. As it is known to all, Zhou Enlai was the former Prime Minister of China. The Chinese people admired him very much because of his ability to lead the people (or leadership). 

Was not too sure if cheerful is the right word, but "cheerful" still works. 

Furthermore,we really have interest on airboat.But we can't try it due to being short of money at last.

Furthermore, we were really interested in riding on the airboat, but we could not because we did not have enough money in the end. 
It proved a enjoyable experience that we all felt at ease.Not only widened our eyesight,but we had a good time.

The trip proved to be an enjoyable experience that we all felt at ease. Not only did it widened our perspectives (or views) but we had a good time.

"Eyesight" specifically talks about your actual eye vision. I think "views" or "perspectives" is better when talking about opinions and viewpoints. "View" can refer to both actual eye vision or opinion. 

With the ending of the 3-day trip,we have to resume our regular learning hours.

Now that our 3-day trip has ended, we have to go back to our regular school hours. 

Most of all,I am ready to hit the books.

Most importantly, I am ready to hit the books.

Good use of English idiomatic phrases.