Vietnamese President Truong Tan Sang (R) meets with visiting Russian Prime Minister Dmitry Medvedev at the President Office in Hanoi, Vietnam, Nov. 7, 2012. Dmitry Medvedev is in Hanoi for a two-day visit to Vietnam. (Xinhua/VNA)

Vietnamese President Truong Tan Sang (R) shakes hands with visiting Russian Prime Minister Dmitry Medvedev at the President Office in Hanoi, Vietnam, Nov. 7, 2012. Dmitry Medvedev is in Hanoi for a two-day visit to Vietnam. (Xinhua/VNA)

Vietnamese National Assembly Chairman Nguyen Sinh Hung (R) shakes hands with visiting Russian Prime Minister Dmitry Medvedev in Hanoi, Vietnam, Nov. 7, 2012. Medvedev is in Hanoi for a two-day visit to Vietnam. (Xinhua/VNA)

Vietnamese National Assembly Chairman Nguyen Sinh Hung (R) meets with visiting Russian Prime Minister Dmitry Medvedev in Hanoi, Vietnam, Nov. 7, 2012. Medvedev is in Hanoi for a two-day visit to Vietnam. (Xinhua/VNA)

General Secretary of the Communist Party of Vietnam Central Committee Nguyen Phu Trong (R) meets with visiting Russian Prime Minister Dmitry Medvedev in Hanoi, Vietnam, Nov. 7, 2012. Medvedev is in Hanoi for a two-day visit to Vietnam. (Xinhua/VNA)