Mikko Ilonen has recorded a round of 63 to move three shots clear at the halfway stage of the China Open.
The world number 207 produced a faultless round to move to 12-under-par to take the lead in Tianjin, ahead of Brett Rumford and Kiradech Aphibarnrat.
Both players produced rounds of 67 to remain in contention, while first-round leader Robert-Jan Derksen moved to eight-under-par.
Lee Slattery and Pablo Larrazabal headed the European challenge by moving to seven-under, with Graeme Storm a shot further back on six-under.
2012 champion Brendan Grace moved as many as 57 places up the leaderboard after a round of 67 took him up to tied-23rd.
