Extended data:
1April 20, 949, the all-out civil war has come to an end, the Kuomintang army was completely defeated and refused to sign a peace agreement. On April 2 1 day, Mao Zedong and Zhu De issued an order to March to the whole country, ordering the whole army to resolutely, thoroughly, cleanly and thoroughly annihilate all Kuomintang reactionaries who dared to resist in China and liberate all China.
That night, a million mighty divisions of the China People's Liberation Army crossed the Yangtze River in three ways on the front line of more than 1,000 miles from Jiangyin, Jiangsu Province in the east and Hukou, Jiangxi Province in the west. On the evening of 23rd, the Third Field Army of East Road Chen Yi occupied Nanking. Mao Zedong was so excited when he heard the news that he wrote this poem.
References:
Baidu Encyclopedia-Seven Methods The People's Liberation Army occupied Nanjing