题目内容：

假设你是李华，你的笔友Jack来信告诉你他想和几个同学开一家网上书店，想征求你的意见。请根据以下要点给Jack写一封回信。

1．好处：可以学会理财及与人沟通，自己看书更方便等；

2．劣势：占用比较多的时间，经验不足，市场把握不好等；

3．提出建议。

注意：1.词数120左右；

2．可适当增加细节，以使行文连贯；

3．开头语与结尾已为你写好，不计入总词数。

Dear Jack，

I was very happy to receive your letter telling me about your plan of opening an online bookstore with some classmates.

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Best wishes!

Yours,

Li Hua