Starting as an independent enterprise in July 1985, China Travel Tours Transportation Services Hong Kong Ltd. (CTTTS) is a coach service provider under the CTG. Under the iconic brand, "CTG Bus" (previously known as "CTS Bus"), the company has operated its businesses in both cross-boundary transportation and bus rental for over 30 years. It is a wholly-owned subsidiary of China Travel International Investment (Hong Kong) Co., LTD (308-HK: Hong Kong Stock Exchange). Due to its unparalleled expertise, CTG Bus has been selected as one of the licensed cross-border coach operators in Hong Kong International Airport, AsiaWorld-Expo, and Hong Kong Disneyland.

CTG Bus is actively expanding its business. It provides quality cross-border shuttle service, with multiple routes between Hong Kong and Guangdong Province and stops across New Territories. In the mainland, the lines reach out to Guangzhou, Panyu, Zengcheng, Kongmoon (Jiangmen), Sunwui (Xinhui), Fatshan (Foshan), Chuangshan (Zhongshan), Hoisaan (Taishan), Dongguan, Shiuhing (Zhaoqing), Shenzhen Bao'an International Airport, Window of the World Shenzhen, Macau, Zhuhai, Guangxi, Huanggang Port and Shenzhen Bay Port. The company’s cross-border business is well known for its punctuality, extensive network, short interval, convenience and round-the-clock service, providing 5 million passengers with safe and enjoyable journey annually.