sentences:  Lin Biao was well aware that the communist force at the time was not capable of fighting with the New 1st Army face to face, and telegraphed back on April 29, claiming that it was impossible to annihilate the New 1st Army at Siping, though this elite nationalist force would definitely be annihilated in Northeast China, it was not the time when defending Siping.However, the unscathed large communist force in other areas was quite capable of badly mauling the exhausted New 1st Army after the fierce battles at Siping in an ambush at the favorable terrain and under the cover of darkness and bad weather, and such ambush was planned later on the presumed nationalist attack on Changchun.Du Yuming, the brilliant nationalist commander would not provide the enemy with such opportunity they wanted and thus would consequently foil the enemy's hope by successfully convincing Chiang Kai-shek instead of immediately continuing to take Changchun after taking Siping as originally planned, the exhausted nationalists would stop at Siping regroup and re-supply, hence avoiding any possible ambush or counterattacks by the enemy.