海南国际旅游岛的建设令全世界所关注，你的澳大利亚朋友Jane在e-mail里谈到七月份要到海南旅游，想事先了解海南情况。

One possible version:
Dear Jane,
I’m so happy to receive your letter and get to know you are going to visit Hainan.
If you want to have a satisfactory trip, it’s necessary to make some preparations ahead of time. First, look through some related websites to get more information about Hainan tourism. I suggest you take a train along the new East Ring Railway to enjoy the beautiful scenery. In addition, it’s hot and humid in July in Hainan, so you’d better bring some summer clothing such as T-shirts, a cap, an umbrella and so on. Remember not to miss the local food and some famous places of interest, such as Nanshan Temple and Five-finger Mountain.
In a word, I hope everything will go well and you can have great fun during your stay in Hainan.
Yours truly,
Li Hua

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