Liu Yunshan (L, front), a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, holds talks with Tran Quoc Vuong, a member of the Politburo of the Communist Party of Vietnam (CPV) Central Committee, Secretary of the CPV Central Committee and Head of the Committee's Inspection Commission, in Hanoi, Vietnam, Sept. 18, 2017. [Photo/Xinhua]

Liu Yunshan (2nd L), a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, holds talks with Tran Quoc Vuong, a member of the Politburo of the Communist Party of Vietnam (CPV) Central Committee, Secretary of the CPV Central Committee and Head of the Committee's Inspection Commission, in Hanoi, Vietnam, Sept. 18, 2017. [Photo/Xinhua]

Liu Yunshan (L), a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, meets with Nguyen Phu Trong, general secretary of the Communist Party of Vietnam Central Committee, in Hanoi, Vietnam, Sept. 18, 2017. [Photo/Xinhua]

Liu Yunshan (L), a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, meets with Nguyen Phu Trong, general secretary of the Communist Party of Vietnam Central Committee, in Hanoi, Vietnam, Sept. 18, 2017. [Photo/Xinhua]

Liu Yunshan, a member of the Standing Committee of the Political Bureau of the Communist Party of China Central Committee, meets with Nguyen Phu Trong, general secretary of the Communist Party of Vietnam Central Committee, in Hanoi, Vietnam, Sept. 18, 2017. [Photo/Xinhua]