out of the way, and though starting after him, to contrive to reach the
goal before him, shows knowledge of the artifice of _deviation_.
[Tu Mu cites the famous march of Chao She in 270 B.C. to relieve the
town of O-yu, which was closely invested by a Ch’in army. The King of
Chao first consulted Lien P’o on the advisability of attempting a
relief, but the latter thought the distance too great, and the
intervening country too rugged and difficult. His Majesty then turned
to Chao She, who fully admitted the hazardous nature of the march, but
finally said: "We shall be like two rats fighting in a whole—and the
pluckier one will win!" So he left the capital with his army, but had
only gone a distance of 30 _li_ when he stopped and began throwing up
entrenchments. For 28 days he continued strengthening his
fortifications, and took care that spies should carry the intelligence
to the enemy. The Ch’in general was overjoyed, and attributed his
adversary’s tardiness to the fact that the beleaguered city was in the
Han State, and thus not actually part of Chao territory. But the spies
had no sooner departed than Chao She began a forced march lasting for
two days and one night, and arrive on the scene of action with such
astonishing rapidity that he was able to occupy a commanding position
on the "North hill" before the enemy had got wind of his movements. A
crushing defeat followed for the Ch’in forces, who were obliged to
raise the siege of O-yu in all haste and retreat across the border.]