Norway's Suzann Pettersen, tied for fourth after the third round, had a 75 to drop into a tie for 19th at 4 under.
Michelle Wie closed with a 68 to tie for 38th at 1 over, and top-ranked Yani Tseng had a 71 to tie for 49th at 5 over. The Taiwanese star has struggled after winning three times in the first five events of the season.
American Morgan Pressel also had another frustrating week in a season derailed by thumb and wrist injuries, shooting 79-83-81-75 to finish 67th among the 68 finishers at 34 over — 49 strokes behind Park.
The tournament opened the LPGA Tour's four-event Asian swing. The tour will be in South Korea, Taiwan and Japan the next three weeks.
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