Sihwan Kim of South Korea birdied his last two holes to shoot a 2-under 69 and lead by a stroke after the second round of the Saint-Omer Open on Friday.
Kim made three birdies and a bogey to remain on top of the leaderboard with a 6-under 136 total.
He is playing his first season in Europe and finished 11th at the Madeira Islands Open in Portugal last month.
Darren Fichardt of South Africa also carded a 69 to move into second place at 5 under.
Englishmen Adam Gee and Simon Wakefield shared the overnight lead with Kim, but they shot 72s to drop to a share of third place at 139. Simon Thornton of Ireland and Wil Besseling of the Netherlands were tied for fifth place at 140.