South Korea's Ha Na Jang has developed a habit of making the extraordinary seem normal.

In January, she made a hole-in-one on a par-4 and last month she won her first LPGA title, at the Coates Golf Championship in Florida.

The 23-year-old was at it again on Friday, holing a monster eagle putt from off the green on her way to a 6-under 66 to grab a share of the halfway lead with her compatriot Mirim Lee at the LPGA's Women's Champions tournament.

Lee got up and down from a greenside bunker to birdie the last and shoot a 67 to join Jang in a two-way tie at the top of a congested leaderboard after a wet and windy second round at Sentosa Golf Club.

Thailand's Pornaning Phatlum carded a 67 and Norway's Suzann Petterson signed for a 69 to be equal third, a stroke behind the leading pair, with a group of four players lurking just one shot further behind and a total of 34 players under par.

The joint overnight leaders, Taiwanese veteran Candie Kung and Australian teenager Minjee Lee both finished strongly after mixed rounds to remain in contention.

Kung regained her composure and parred her last seven holes after making a disastrous double-bogey on the 11th to shoot a par 72 and remain 5-under while Minjee Lee birdied her last two holes to get to 4-under after spoiling her card with five bogeys.

The defending champion, South Korea's Inbee Park, was at 3-under after dropping three shots on her opening four holes while New Zealand's world No. 1 Lydia Ko fell nine shots behind the leaders after a 2-over 74 that included a double bogey on her opening hole.