sentences:  It was obvious that it would be only a matter of time before the communist stronghold at Pagoda Mountain (Ta Zi Shan, 塔子山) would be taken by the attacking nationalists, and with neither the technical nor the numerical superiority, Lin Biao believed it was much more important to preserve the communist strength for the future and he radioed Mao Zedong on May 18, to report the situation and intention to abandon the city.After sending the message, Lin Biao ordered a general withdraw without waiting for the Mao's reply, and by midnight, the general withdrawal in was completed in an orderly fashion and in total secrecy.Next morning, the nationalists entered and secured the city, and only after that did Mao's reply came on May 19, in which Mao finally changed his mind and agreed with Lin Biao.