On 2 December 2007 the Kowloon–Canton Railway Corporation (KCRC) granted a 50-year service concession (which may be extended) of the KCR network to MTR, in return for making annual payments to KCRC, thereby merging the railway operations of the two corporations under MTRCL's management. After the merger, the MTR network included three more lines—East Rail Line, West Rail Line, and Ma On Shan Line—as well as the Light Rail network and Guangdong Through Train to Guangzhou. For more frequent services, MTR promoted a program - Listening ‧ Responding.