To sign up for services with Sichuan China International Travel Service (CITS), you can visit their main office located at No. 51, South Renmin Road Section 4, Wuhou District, Chengdu. As one of the city's earliest and most established travel agencies, they offer a wide range of domestic and international tourism packages, including specialized tours for pandas, Tibet, and the Yangtze River. For those who prefer online registration, you can explore and book tours through their official website or contact them via email at 1311875726@qq.com. Additionally, the agency maintains a presence on major travel platforms where you can browse private and group tour options. Their comprehensive service includes tour consulting, visa assistance, and customized itineraries tailored to individual budgets and interests.