[Because the attempt would be futile, and would expose the blocking force itself to serious risks. There are two interpretations available here. I follow that of Chang Yu. The other is indicated in Ts`ao Kung's brief note: "Draw closer together"--i.e., see that a portion of your own army is not cut off.]
Endroit: ¶734 Licence: Public domain · Source Le texte est donné tel que dans l'édition, sans retouche.