MANILA, 21 Nov 2014 (AFP) - Opening round co-leader Mardan, 47, was one over par through 12 holes before brilliantly sinking five birdies over his six closing holes to score a four-under-par 68 for the day.
Both Mardan and Wang are at 11-under-par 133 over two rounds at the million-dollar golf tournament, the country's richest pot so far for the sport.
"I couldn't get my momentum right on my front nine. I told myself to stay patient and I managed to finish well," Mardan said.
Wang kept pace with nine birdies to go with two bogeys for a seven-under 65 on Friday.
Leading scores after the second round at the par-72 Manila Southwoods course:
133 - Mardan Mamat (SIN) 65-68; Wang Jeung-hun (KOR) 68-65
135 - Kiradech Aphibarnrat (THA) 66-69
137 - Danny Chia (MAS) 66-71; Steve Lewton (ENG) 71-66
138 - Hung Chien-yao (TPE) 67-71; Nicholas Fung (MAS) 69-69; Daisuke Kataoka (JPN) 65-73; Paul Peterson (USA) 68-70; Javi Colomo (ESP) 69-69