阅读下面的短文，然后按照要求写一篇150词左右的英语短文．
Nowadays，a new way of shopping is attracting increasing customers：online group buying，also known as collective buying，which offers products and services at reduced prices on the condition that a minimum number of buyers would make the purchase．Origins of group buying can be traced to China where group buying or team buying was executed to get discount prices when a large group of people were willing to buy the same item．
China group buying business hit 1.74billion dollars in 2011，up 55% from the same period in 2010，according to a report．The report also shows that 2011was the year that the Chinese group-buying market got more and more concentrated with more and more Chinese，most of whom are white collars，teenagers and college students enjoying the benefits of group buying，and among most of favorable buying categories are restaurant，movie and hotel booking for traveling．
Through grouping buying，on one hand，customers get a lower price than normal．On the other hand，businessmen also cut down expense on marketing．That is the reason why group buying websites spring up like mushrooms in recent years．What is the most attractive in group buying must be the unbelieving discount．Facing the discount，customers always couldn't resist the impulse to buy the product，even though they don't need them．
【写作内容】
1．以约30个词概括上文的主要内容．
2．以约120个词写一篇关于"团购"的短文，内容包括：
（1）你对团购的看法并陈述理由；
（2）谈谈你自己或他人的一次团购经历；
（3）请你给团购者提一些有用的建议．
【写作要求】
1．作文中可使用自己的亲身经历或虚构的故事，也可以参照阅读材料的内容，但不得直接引用原文中的句子；
2．作文中不能出现真实姓名和学校名称．
【评分标准】
概括准确，语言规范，内容合适，语篇连贯．
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