This chapter reports on a study that employs geo-tagged data from Sina Weibo to investigate the spatial pattern of Chinese domestic tourist flows during the National Day Golden Week in 2014. Based on a dyadic matrix of inter-province tourist flows, the results show that the Weibo data is highly correlated with the official tourism statistics. Factor analysis unveils several spatially independent fields of tourist flows in China, such as the area around Beijing as well as the regions in the East, Southwest, Northwest, Northeast, and Central South. Furthermore, the estimation results from the negative binomial spatial interaction model highlight several determinants of tourist flows, including the distance between the origin and destination, the size of economies in the origin and destination, the hotel infrastructure in the destination, and the number of world heritage sites and AAAA scenic spots in the destination areas.