On a tough day for scoring, Andy Sullivan stood apart from the crowd.
Shane Lowry has dropped back to 2 under after his second round at the Singapore Classic.
The Clara man carded a 73 that included five birdies, two bogeys, and two double bogeys.
Tom McKibbin finished his second round on one over and is likely to miss the weekend cut.
Kiradech Aphibarnrat leads on 10 under par.
Andy Sullivan tied the course record with a blemish-free 63 and is a shot further back.
On the PGA Tour, Waterford's Seamus Power goes into day 2 of the Valspar Championship on 3 under par, four shots behind the leader Kevin Streelman.
While on the LPGA Tour, Leona Maguire is level par heading into the second round of the Fir Hills Seri Pak Championship in California.
Canada's Maude-Aimee Leblanc leads on 7 under.
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