Lee completed 120kms from Nha Trang City of Khanh Hoa Province to Phan Rang City of Ninh Thuan Province in 3hrs 25.55mins.
She was followed by teammate Kim Youri and Nguyen Thi Thi of Gao Hat Ngoc Troi An Giang.
Dinh Thi Nhu Quynh of Biwase Binh Duong grabbed the polka dot jersey for the Queen of the Mountain with 59 points. She was first to reach the Prenn Pass near Da Lat in the third stage and was in the top group at the passes of Cu Hinh, Chua Mountain and Quynh. There is no pass in the rest of the tournament.
Nguyen Thi Thu Mai of Gao Hat Ngoc Troi An Giang maintains the lead after five stages with a total time of 12.58.54.
In the team ranking, Biwase Binh Duong is on top. Gao Hat Ngoc Troi An Giang and the team from the Netherlands are close behind.
The sixth stage today is 115km from Phan Rang to Phan Thiet City of Binh Thuan Province.