To sign up for services with Chengdu China Youth Travel Service Co., Ltd., you can visit their main office located at 315, Building A, Jingang Shangcheng, 59 Xiangnongsi Jie, 3rd Western Section, Yihuan Lu, Chengdu. This office is accessible via public bus numbers 4, 11, and 27. For inquiries and bookings, you can contact them by phone at 028-8888-7020 or 8992-2022. Additionally, the agency maintains a presence at No. 42, Xia Shahepu Street in the Jinjiang District and 7F, Unit 1, Building No. 5, 399 Fucheng Avenue West Section in the Gaoxin District. Travelers can also explore their offerings and potentially initiate bookings through their official website at http://www.78sc.com. The agency specializes in trips for younger travelers, including summer camps and cultural exchanges, as well as outdoor activities like hiking and mountaineering.