In the morning, hike up to some Tay villages. They live in the wildest area along the border with China. You will be very welcome to local families, who live in beautiful traditional stilt-houses and have a rich culture. Visit more villages around Quang Uyen where in 1950s Viet Minh won the battlefield in Dong Khe and the French ran through jungle toward Lang Son, but they felt into an ambush of Viet Minh and more than 5.000 French was arrested in Coc Xa. At that time, Viet Minh had no prison to keep them and they had kept the French Prisoners of War in many local families and these prisoners worked on the rice fields with local people.

Ride in the middle of magic landscapes with many lovely smiling faces, waving hands from locals on the road. Just right at the conjunction of Bac Vong and Bang Giang river, there is a border gate called "Thuy Khau" - river mouth bordering gate - known in Chinese as Shuikojie.

Cross Bang Giang river down to the other side of Dong Khe valley, the battlefield of Viet Minh and local army.Ride on the RC 4 to That Khe with visits to more battlefields until Lang Son. Stop at Friendship Border Gate "Huu Nghi Quan" and Dong Dang town where you will see Chinese products flood the town. Minsk riders here drive at full throttle with Chinese products at the back.

Mau Son is about 30 kilometers from Lang Son. The winding narrow mountain path, like a snake, lies tucked between 2 steep mountains. Climb to reach the top of Mau Son which is 1,542 m above of the sea level. This area's picturesque scenery turns it into another Sapa characterized with the beautiful steep mountains. In the late afternoon, we can enjoy a comfortable sight seeing at sunset in Mau Son and observe China at the foot of mountain.