My cover letter

Dear Sir or Madam:
I am a student from Shanghai University, Sydney Institute of Language and Commerce. I am major in International Economics and Trade. I am interested in the position of Human resource position of your company.
I know that The Jinqiao Logistic Company is one of the biggest logistic companies in China; I will be honored to be your employee. I know from your apply advertisement, this position is responsible for providing administrate human resource, and financial coordination for the Resource Department. My majority is international economy and trade, I got deep knowledge of global marketing, and human behavior organization, which is close relative to this position. I wish I could have the opportunity to get the job. Thank you for reading my letter, and look forward your reply.
You can contact me with the Tel number: 69982165.
Yours
Sincerely Jenny

[Tdol]

I am major in International Economics and Trade.

I'd say 'a major' or 'my major is'