Qerten was located on the south-west side of Jialin. Unlike Rean and Roan's country, this one is not controlled by a Royal Family, but the sects within. In total, seven sects jointly manage the country, with two of them being at war at the moment.
Those two Sects were fighting over a Spiritual Vein recently found close to each one's borders. However, due to the size of both sects, the area of the war was gigantic. Turns out that the mountain range with the Midday Ginseng is also somewhat close to the area of mutual aggression.
Thanks to Nana's speed, the twins only took one day and a half instead of the seven days of flight previously expected. However, Nana did not enter the area controlled by those two sects. After all, a Peak Stage Four Demon beast following two kids on the ground would catch too much attention. It was different from her flying at high altitudes, where it was hard to see.