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. 微信是非常受歡迎的社交工具，許多外國人也在用。微信比其他社交軟件更私密，這使得它受到更多用戶的喜愛。微信的一個亮點是用戶可以關注他們感興趣的事物，然後他們還可以發佈這些信息。這個功能深受商人喜愛，他們喜歡發佈一些打折信息。那些在微信分享信息的用戶可以以低價格購買。犯罪事件也隨之發生。一些用戶會用自己的真實信息註冊，信息就又被泄漏的可能性，壞人會利用這些信息來做一些違法犯罪的事情。最好避免被欺騙的方法是不要相信超級低價格的商品。總之，天下沒有免費的午餐。
