Lost in Thailand is a 2012 Chinese comedy film directed and co-written by Xu Zheng and starring Xu Zheng, Wang Baoqiang, and Huang Bo. The film is about three Chinese men traveling in Thailand: two competing scientists searching for their boss, and a tourist eager to explore the country. The film is Xu's directorial debut.

According to Du and colleagues, within the first week, the film’s box office revenue reached ¥310 million RMB and set the first week box office record for Chinese cinema. As of January 27, 2013, the film had collected ¥1.3 billion RMB in Mainland China with over 39 million moviegoers. This elevated it to the highest-grossing Chinese-language film in China’s history at that time.