该片讲述了1945年至1949年,新中国成立前,黑龙江为东北全境解放和全国解放战争的胜利提供了巨大的后方保障,成为新中国建设事业试验区的历史进程的故事。。A documentary that tackles the ideological conflicts surrounding the December 21 election in the country, to the push for sovereignty and subsequent parliamentary declaration of independence and the aftermath.。