As a wholly owned subsidiary of China National Travel Service Group Corporation (formerly the China Travel Service(HK)Group Corporation), China Travel Service Head Office Co., Ltd. (hereinafter referred to as "CTS Head Office") is responsible for the travel agency business of the group. In 2007, the China Travel Service (HK) Group Corporation realized a giant merger and reorganization with CTS (Holdings) Corporation of China. After the reorganization, the core branches of both parties, namely the CTS Head Office, China Travel International (CTI), China Merchants International Travel (CMIT), China Travel Service (Hong Kong) and overseas branches were integrated to constitute the CTS Head Office.