Photo exhibition invitation - ielts letter

You won a first prize of in a photography competition and some of your photos are shown in a photo exhibition. Write a letter to invite your friend to the photo exhibition. In your letter,

1. Give details about the competition and the prize
2. Describe the photograph you took
3. Invite your friend to come to the exhibition
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Dear Mr. Robert,
I am so happy to write this letter to you after quite a long time and I am so excited to tell you that I won the fist prize in the photography competition organized by the local government. I am here to invite you to participate my art exhibition.

Last year, I went to the local exhibition center and there was a competition attracting me as I am a big fun of photography. First of all, the title of this competition is "life on campus", which means each candidate have to take photos that can represent their experience and life in our school. Secondly, the prize is also tempting, 5 grand, which is essential to cover my tuition of my course. In order to win this competition, I took a few pictures of wild animals such as lizards and frogs inside our campus, which are very unique to other universities. Eventually, I won the prize because the organizer thought that my works can best show the school's features.

Therefore, I heard that you have plan to continue your further study in our school and I hope you can come to this great exhibition to utilize this great opportunity to know more about our school.

Best Regards,
Shigang xing.

You should put therefore in the middle: I heard that you have plan to continue your further study in our school, therefore, I hope you can come to this great exhibition to utilize this great opportunity to know more about the campus as well as the school's features

Does that sound better?

I think in the body, you should include more details of your photos so that it may attract the receiver, for instance how unique it is compared with the other photos or sth like that :) Hope this can help :D