To sign up for services with the Chengdu China Youth Travel Service (CYTS), you can visit their main office located at 315, Building A, Jingang Shangcheng, 59 Xiangnongsi Jie, 3rd Western Section, Yihuan Lu, Chengdu. For convenience, the office is accessible via several public bus routes, including numbers 4, 11, 27, and 34. Alternatively, you can contact them by phone at 028-8888-7020 or 8992-2022 to inquire about their specialized travel offerings, such as summer camps, cultural exchanges, and outward-bound pursuits like hiking and mountaineering. For online inquiries and bookings, the agency operates a Chinese-language website at http://www.78sc.com/ and has a presence on international booking platforms like ChinaExploration.com, which was founded in collaboration with the Sichuan China Youth Travel Service. Some administrative offices are also listed at 7F, Unit 1, Building 5, No. 399 Fucheng Avenue West Section in the Gaoxin District.