Lee Dong-jun scored twice and Kim Dea-won added a third to help South Korea U19s cruise to victory over Singapore U21s in the second semi-final of the International U-21 Football Tournament.
The Korean team will play Viet Nam's Hoang Anh Gia Lai U21s in the final on Sunday at HCM City's Thong Nhat Stadium.
The Korean side dominated from the kick-off, and Kang Ji-hun tested Singapore's keeper Mohammed Mohd Rudy with a rocket that hit the post in the 16th minute.
Singapore tried to push forward, but were hit by two injuries in the first half.
Mohamad Faruk threatened for Singapore, but was thwarted by Korean goalie Song Bum-keun.
Lee Dong-jun opened the scoring in the 34th minute after winning and converting a penalty.
Korea took control of the game with a well-orgnised defence and rapid counter-attacks.
After the break, Singapore showed some signs of life, with substitute Muhammad Bin Mohd Farhan's long range shot on goal, but it was not enough to beat Song Bum-keun.
Lee hit the bar with a powerful header in the 50th minute, before Singapore captain Mohammad Bin Roslan was sent off for a dangerous tackle Woo Chan-yang.
In the 63rd minute, Lee beat the offside trap to dribble past Mohammed Mohd Rudy before netting the ball into an empty net.
Singapore tried to press again in the final minutes of the game, but. Kim Dea-won put an end to their hopes in the second minute of injury time, completing a convincing win for South Korea.
Korea will have a psychological advantage in the final, having beaten Hoang Anh Gia Lai 1-0 in the group stages.
The winners of the tournament will walk away with a cash prize of VND 1 billion (US$44,400).
VNS