 Zhang, who had taken the imperial forces, as well as reinforcements from the circuits near Chang'an, and advanced to Yindi Pass (陰地關, in modern Jinzhong, Shanxi), not wanting Zhaoyi to fall into Zhu Quanzhong's control, agreed, and sent Sun on his way to Zhaoyi in fall 890.Li Cunxiao ambushed Sun on the way and captured him, causing great distress to the morale of the imperial troops.