Once, Cai Jing sent the two generals Shan Ting-gui and Wei Ding-guo, both well-versed in attacking the enemy by water strategies and fire strategies respectively.
Cai Jing sent the two generals Shan Ting-gui and Wei Ding-guo-versed in attacking the enemy by water strategies and fire strategies respectively. This was once. Guo was both well.