South Korea served notice that they will be no-one's fools at this year's World Cup with a comprehensive victory over a woefully inadequate Scotland team.
The Scots' deficiencies were highlighted to stunning effect by the infinitely superior South Koreans, who limited the visitors to a couple of decent scoring chances.
Striker Lee Chun-Soo was the star man, scoring the first and tormenting the Scottish defence until he was eventually subbed in the second half.
Ahn Jung-Hwan scored twice after coming on for the second period, with Yoon Jong-Hwan getting the other.
Scott Dobie marked his international debut with a consolation goal, but the Scots were totally outplayed.
South Korea were the better side from the outset, and they threatened twice before Lee Chun-Soo shot into the sidenetting, although the flag was already raised for offside.
It was no surprise, therefore, that the home team took the lead in the 14th minute.
A long ball beat David Weir, allowing Lee Chun-Soo to control the ball, cut back inside Weir and round Neil Sullivan before slotting the ball into the empty net.
Graham Alexander almost put through his own net as he cut out a dangerous cross.
South Korea should have had a second in the 27th minute.
Lee Chun-Soo's cross found its way to Hwang in front of goal, but the experienced striker scooped his effort well over.
The closest Scotland came to a shot at goal in the first half came in 41 minutes when Dobie's cross-cum-shot was easily dealt with by goalkeeper Kim Byung-Ji.
The home team should have doubled their lead again just after half-time when Lee Chun-Soo's free kick found sub Ahn Jung-Hwan who somehow put the ball wide, although the flag was up.
Gary Caldwell fired a shot well over at the other end, before Yoo Sang-Chul twice threatened the Scots goal.
But the inevitable second goal arrived in the 58th minute from substitute Ahn Jung-Hwan.
He turned Alexander inside out and fired a 20-yard shot past Sullivan, who might have made a better fist of his attempt at saving the effort.
Yoon Jong-Hwan, marked his entry in astonishing fashion by hammering a remarkable third goal past Sullivan from long range.
Scotland were given something to shout about when debutant Dobie headed a consolation goal in the 74th minute, meeting a Scot Gemmill free kick at the back post.
But the South Koreans were not yet finished and they rounded things off with a fantastic fourth goal.
Perugia striker Ahn Jung-Hwan rounded off a superb move with a delicate chip over Sullivan.
South Korea: Kim Byung-Ji, Hong Myung-Bo, Yoo Sang-Chul, Choi Jin-Chul, Kim Tae-Young, Song Chong-Gug, Lee Eul-Yong, Park Ji-Sung, Lee Young-Pyo, Lee Chun-Soo, Hwang Sun-Hong. Subs: Lee Woon-Jae, Choi Eun-Sung, Lee Min-Sung, Kim Nam-Il, Choi Sung-Yong, Hyun Young-Min, Yoon Jong-Hwan, Ahn Jung-Hwan, Seol Ki-Hyeon, Choi Yong-Soo, Cha Doo-Ri, Choi Tae-Uk.
Scotland: Sullivan, Graham Alexander, Dailly, Weir, Ross, Gary Caldwell, Gemmill, Stewart, Johnston, Dobie, O'Connor. Subs: Paul Gallacher, Neil Alexander, Stockdale, Wilkie, Cummings, Severin, Williams, McFadden, Kyle.
Referee: N Sanghan (Singapore).