Sarah Lee climbed into a share of the lead at the Korean Ladies Masters after carding an even-par 72 in Jeju on Saturday.
The London-born Korean shot three birdies against four bogeys to move alongside Yang Soo-jin at the top of the leaderboard on three under 141 heading into Sunday's final round.
Yang was one of the few to manage a below-par score as she carded three birdies against two bogeys for a 71.
Overnight leader and defending champion Seo Hee-kyung dropped to one shot off the pace after a 74 and is in a share of third alongside Kim Bo-kyung, Kim Hyun-ji and amateur Han Eun-jeong on two under.
The highest-ranked European at the tournament, Becky Brewerton, managed a second successive 73 and is tied 19th on two over, 146, overall.
Collated second round scores & totals in the Ladies European Tour Daishin Securities Tomato Tour Korean Ladies Masters, Cypress Golf & Resort, Jeju, South Korea
(Par: 72)
141 Soo-Jin Yang (Kor) 70 71, Sarah Lee (Kor) 69 72
142 Jung-Eun Han (Kor) 71 71, Bo-Kyung Kim (Kor) 71 71, Hee-Kyung Seo (Kor) 68 74, Hyun-Ji Kim (Kor) 69 73
143 Ae-Ree Pyun (Kor) 70 73, Anna Rawson (Aus) 69 74
144 Sung Ah Yim (Kor) 75 69, Jeong-Eun 5 Lee (Kor) 74 70, Ji-Hae Jang (Kor) 74 70, Rebecca Coakley (Irl) 72 72, So-Young 2 Kim (Kor) 70 74
145 So Yeon Ryu (Kor) 76 69, Jade Schaeffer (Fra) 74 71, Se-Young Kim (Kor) 73 72, Minea Blomqvist (Fin) 72 73, Bo-Mee Lee (Kor) 69 76
146 Marianne Skarpnord (Nor) 74 72, Becky Brewerton (Wal) 73 73, Hyeon-Ju Lee (Kor) 77 69, Frances Bondad (Aus) 72 74, Hyun Hee Moon (Kor) 70 76, Hyun-Hwa Shim (Kor) 70 76
147 Young-Ae Ham (Kor) 72 75, Stephanie Na (Aus) 72 75, Shin-Ae Ahn (Kor) 71 76
148 Ji-Yeon Woo (Kor) 74 74, Hyun-Soo Kim (Kor) 75 73, Il-Mi Chung (Kor) 74 74, Hae-Won Jeong (Kor) 76 72, Jin Joo Hong (Kor) 73 75, Seul-A Yoon (Kor) 73 75, Ran Hong (Kor) 73 75
149 Hye-Jung Choi (Kor) 75 74, Young-Ran Jo (Kor) 75 74, Yun-Hee Cho (Kor) 74 75, Martina Gillen (Irl) 74 75, Ju-Mi Kim (Kor) 74 75, Morgana Robbertze (Rsa) 73 76, Ha-Neul Kim (Kor) 73 76, He-Yong Choi (Kor) 72 77, Anna Knutsson (Swe) 72 77, Aram Cho (Kor) 71 78
150 Da-Som Lee (Kor) 75 75, Julieta Granada (Par) 75 75, Bo Mi Suh (Kor) 76 74, Lora Fairclough (Eng) 76 74, Sun Wook Lim (Kor) 74 76, Chang-Hee Lee (Kor) 74 76, Sun-Hwa2 Lee (Kor) 77 73, Cecilie Lundgreen (Nor) 77 73, Min-Gee Song (Kor) 73 77
151 Ji-Na Lim (Kor) 74 77, You-Na Park (Kor) 73 78, Iben Tinning (Den) 72 79, Vikki Laing (Sco) 78 73, Ii Hee Lee (Kor) 79 72
152 Hae-Jung Kim (Kor) 75 77, Riikka Hakkarainen (Fin) 74 78, Hye-In Lee (Kor) 77 75, Laurette Maritz (Rsa) 73 79, Hye-Jin Jung (Kor) 77 75, Titiya Plucksataporn (Tha) 77 75, Lee-Anne Pace (Rsa) 79 73, Hye Youn Kim (Kor) 79 73
Missed the cut:
153 Soo-Hwa Jang (Kor) 75 78, An-Na Oh (Kor) 76 77, Um-Ji Kang (Kor) 76 77, Hui-Jeong Kim (Kor) 77 76, Melodie Bourdy (Fra) 73 80, Hae-Joo Han (Kor) 77 76, Eun-Jung Sin (Kor) 79 74, Jin Young Pak (Kor) 79 74
154 Samantha Head (Eng) 75 79, Young Kim (Kor) 76 78, Ursula Wikstrom (Fin) 76 78, Gwladys Nocera (Fra) 76 78, Julie Tvede (Den) 76 78, Virginie Lagoutte-Clement (Fra) 81 73
155 Smriti Mehra (Ind) 76 79
156 Zuzana Masinova (Cro) 75 81, Ha-Na Chae (Kor) 77 79, Chae-A Oh (Kor) 77 79, Jae-Eun Chung (Kor) 78 78, Kirsty S Taylor (Eng) 80 76
157 Jenni Kuosa (Fin) 76 81, Frederique Seeholzer (Swi) 81 76
158 Hei-Ji Kim (Kor) 78 80, Km Juul (Den) 78 80, Min-Sun Kim (Kor) 79 79, Kyra Van Leeuwen (Ned) 79 79, Clare Queen (Sco) 80 78
160 Lynn Kenny (Sco) 77 83, Laure Sibille (Fra) 80 80, Christine Hallstrom (Swe) 81 79
161 Joanne Oliver (Eng) 79 82, Min-Sun 2 Kim (Kor) 79 82, Denise-Charlotte Becker (Ger) 85 76
163 Eva Steinberger (Aut) 78 85, Cassandra Kirkland (Fra) 81 82
164 Tara Delaney (Irl) 77 87