The Spanish champions have agreed to pay the South Korean promoters of the first game 200,000 euros in compensation after Messi played just 17 minutes against a K-League select XI on Wednesday.
The World Player of the Year played all 46 minutes of the first half on Sunday and Barcelona coach Pep Guardiola denied he had been pressured into keeping the Argentine forward on the pitch.
"If there had been pressure I would have let him play 45 minutes in Korea," he told reporters. "The arrangements are made according to tactical requirements. Seeing him in training, he was fit enough to play the entire half."
Messi's presence was all the more important after Barcelona travelled to Asia without any of their eight Spanish World Cup winners - the absence of Xavi in Seoul costing them another 100,000 euros in compensation.
"He needs time to recover from the World Cup, he's only had four or five days intensive training," Guardiola added.
Messi's less well known team mates provided the first half scoring, with Sergi Roberto finding the net after 10 minutes and Nolito doubling the advantage three minutes later by volleying home from an angle.
"I hope on our next visit, this world class stadium has a better pitch," said Guardiola. "World class performances need world class pitches."
"Ibrahimovic has only got half a game in him at the moment," explained Guardiola. "I needed to balance the first and second half so I had Messi start and Ibrahimovic as the substitute."
The match, played out in front of a half-full stadium, was the highlight of China's second National Fitness Day, which marks the anniversary of the opening of the 2008 Beijing Olympics.
