This tournament has been plagued by problems since Friday's opening round. There were multiple rulings that slowed play down and the first round was suspended for darkness.
Twenty-five players were scheduled to return to Trump National at 10:15 a.m. (ET) Saturday, but a fog delay pushed back play for more than three hours.
Only half of the field completed their second rounds before play was halted for darkness on Saturday. The plan is to return at 10:45 a.m. Sunday morning to finish off round two, but the weather forecast calls for more fog Sunday, so a Monday finish looms as a possibility.
Catriona Matthew and Karine Icher are both at 7-under par on the course.
Tina Barrett fired a 5-under 66 in the second round and is tied with Jennifer Rosales, who posted a 1-under 70 on Saturday. The duo is knotted at 6-under-par 136.
Defending champion Annika Sorenstam managed a 1-under 70 and is currently tied for 21st place at minus-3.
Han began the second round on the back nine and immediately broke into red figures. She knocked a sand wedge to 8 feet at the 10th and converted the birdie putt. Han collected back-to-back birdies at 13 and 14 from 10 and 12 feet, respectively.
Her first hiccup of the round came at the 16th. Han only needed a pitching wedge for her approach shot, but three-putted for a bogey. She parred three holes around the turn, but made her move up the leaderboard early on the second nine.
At the par-5 second, Han reached the green in two with a 7-wood and two-putted for a birdie. She hit a 9-iron to 8 feet to set up birdie at the third and reach 10-under par for the championship.
Trouble loomed for the three-time winner on the LPGA Tour. At the par-5 seventh, Han once again struggled with a wedge in her hand as she hit her third into a greenside bunker. She blasted out to 15 feet and two-putted for a bogey that dropped her to 9 under.
Han will take that score. She's just happy to have finished the second round on Saturday.
'We were just waiting, waiting, waiting today,' said Han. 'It's a little bit frustrating, but we just finished today. That's a pretty good thing.'
Han knows difficult conditions are on the way Sunday and she has a game plan.
'I think tomorrow, it's going to be a little tough,' admitted Han, who has seven top-10s in 2005. 'I think that's why I'll play a little more aggressive tomorrow.'
Eva Dahllof, Jamie Hullett and Maria Hjorth all posted 2-under-par 69s in the second round and are knotted at 5-under-par 137.
Young Jo posted a 4-under 67 on Saturday and is tied with Liselotte Neumann, who fired a 5-under-par 66 in round two. The pair is knotted at minus-4.