Mongolian highway in Menengyn tal province

Some more kilometers, we had to stop at a check point to enter restricted area. A special permit was necessary to go on to the Buir Nuur (lake) the most east target of our trip. Unfortunately we hadn't the right permit from authorities in Ulaanbaatar and so we couldn't enter and go on to the lake.
We decided to turn to the south in an other direction to Sangyn Dalai and Erdenetsagaan.