Seoul: South Korea's Lee Soo-Min surged to a third-round lead after shooting a one-under-par 71 for 210 in the GS Caltex Maekyung Open in Seoul Saturday.
One off the lead in second place was his countryman Lee Sang-Hee who came in with a 67 at Namseoul Country Club.
Two shots off the lead and tied for third were five South Koreans including defending champion Moon Kyung-Jun.
Moon had started the day in front but bogeyed three times in the first nine and double-bogeyed the last slip back for a 77.
Lee, ranked seventh on last year's OneAsia Order of Merit, recorded breakthrough victory at the Shenzhen International last month.
The 22-year-old showed his potential on OneAsia last year with a runner-up finish at the SK Telecom Open and he tied for 13th spot here at the GS Caltex Maekyung Open.
His wire-to-wire victory in the Shenzhen International banished the memory of the Maybank Championship Malaysia in February where he came into the final round with a three-stroke lead but made two double-bogeys in his last three holes to finish in a share of second.
Leading third-round scores (South Koreans unless stated):
210 - Lee Soo-Min
211- Lee Sang-Hee
212 - Lee Chang-Woo, Kim Kyung-Tae, Kim Bio, Moon Kyong-Jun, Park Sang-Hyun
213 - Mark Baldwin(USA), Kim Hyung-Sung, Michael Sim (AUS)
AFP