Explanation: By: taking advantage of. Taking advantage of the situation continue to pursue the enemy of victory, to build on. Source: "A New History of the Five Dynasties History beam volume assessment, then": "Li Sian Horses struggle to pay by more than twenty together, pulled the gun walk back and forth Si'an defeat, retreated. One can be and win.
chéng shèng zhuī jī
Taking advantage of defeat the enemy soldiers chasing victory