For an online tour operator, the most useful means is to check the ‘About Us’ section of the website, which performs as a self-introduction. Here you should find the full name of the company who runs the website, as well as corresponding licenses and other related documents issued by the authority, as proof of its legitimacy. License of Xian Marco Polo Int’l Travel Service License of Xian Diamond Network Co. Ltd In the absence of such information either the company or the website could be fraudulent or unreliable. However, the ‘About Us’ section of TravelChinaGuide.com shows that the website, run by Xian Marco Polo Int’l Travel Service Co., Ltd. and Xian Diamond Network Co. Ltd., is that of a legitimate tour operator. You can check the page Who We Are to find the authorized licenses, and What We Do to know about our tourist business.