A coordinated ambush by numerous black-clad assassins on Chen Zhiwei's convoy at the narrow One-Line Heaven gorge. The assassins descended from canyon walls on ropes, targeting Chen Zhiwei's carriage specifically. They attacked with a rain of black-feathered arrows followed by close combat. Chen Zhiwei personally entered the battle wielding an iron rod, killing three assassins single-handedly and terrifying the rest. She ordered all assassins killed, and the imperial guards executed her order, turning the battle into a one-sided slaughter.
