 The Northern Chanyu—said to be greatly shocked by this—launched a counterattack, but he was forced to flee as he left his family and seal behind.The Han killed 8000 men and captured several thousands.In 91 AD, General Geng Kui and Major Ren Shang with a light cavalry of 800 advanced further via the Juyan Gol (Juyansai) into the Altai Mountains, where the Northern Chanyu had encamped.