WeChat has been the very popular communication tool, and many foreign people have also used it. WeChat is more private than other social soft-wares, which makes it be favored by many users. The important function of WeChat is that users can keep trace of what they are interested in and then they can also release this information. This function is used by the businessmen, because they like to release the information of great discount, the one who shares the information in his wechat can buy at the low price. Then the criminal incident happens. Some users will register with their real information, which will be let out and the bad guys will make use of this information to do criminal things. The best way to avoid being cheated is to never believe the super low price. In short, there is no free lunch. 微信是非常受欢迎的社交工具，许多外国人也在用。微信比其他社交软件更私密，这使得它受到更多用户的喜爱。微信的一个亮点是用户可以关注他们感兴趣的事物，然后他们还可以发布这些信息。这个功能深受商人喜爱，他们喜欢发布一些打折信息。那些在微信分享信息的用户可以以低价格购买。犯罪事件也随之发生。一些用户会用自己的真实信息注册，信息就又被泄漏的可能性，坏人会利用这些信息来做一些违法犯罪的事情。最好避免被欺骗的方法是不要相信超级低价格的商品。总之，天下没有免费的午餐。
