The Korean found the net in the eighth minute, after being well set-up by best friend Patrice Evra.
"It's our aim to be at the front. We always try to perform in this period of the season and we're just trying to make our performance higher," Park told MUTV.
"We're still only halfway through the season and we will continue to press City.
"Quite a few players changed [against Wigan] compared to the last game, but we still kept up the same performance as we did against Fulham. It's good for the team and it proves that our squad is strong.
"Early goals make us more confident and energetic for the rest of the game," he added. "We always try to keep going and stay concentrated. Early goals help that a lot."