Vietnamese and Russian soldiers work on Vietnam's first Russian-made submarine "Hanoi" in Cam Ranh bay of south Vietnam on Jan. 3, 2014. The diesel powered submarine arrived at Cam Ranh military port Friday. It is the first of six 636 Kilo-class submarines that Vietnam oought from Russia to modernize its navy. The handover ceremony will be held on Jan. 10. (Xinhua/VNA)