FC Seoul reached the Asian Champions League quarterfinals for the third time in five years, scoring three second-half goals to beat Beijing Guoan 3-1 on Tuesday night.
After being held to a scoreless draw at home in the first leg last week, Beijing opened the scoring in the 9th minute at Seoul via French striker Fred Kanoute.
Adilson Dos Santos equalised after an hour and the K-League champions took the lead in the 70th minute with Yun Il-lok's shot from close range.
Koh Myong-jin secured the victory in stoppage time.
Beijing finished with nine men - Kanoute and midfielder Zhang Xinxin picked up their second yellow cards in the last 10 minutes. Adilson was sent off after his second booking in the 87th.
Later on Tuesday, Thailand's Buriram United were taking a slender one-goal margin to Tashkent to meet Uzbek club Bunyodkor, a two-time ACL semifinalist.
In west Asia second-round matches in Saudi Arabia, Al Shabab are hosting Al Gharafa of Qatar and Al-Ahli are at home to Al-Jaish.
Seoul were the first team through to the quarterfinals, with Yun scoring once and setting up another goal.
Kanoute took advance of a defensive blunder to score the only goal of the first half and Seoul missed two chances to equalise in the 15 mintues after half time. Beijing goalkeeper Yang Zhi saved a close-range header from Ha Dae-sung in the 53rd minute and then Seoul striker Dejan Damjanovic hit the post with a penalty attempt on the hour.
But the Korean club took advantage of the last momentum, scoring three unanswered goals in the last half hour to advance to the next stage.