我国的东北地区,在明末清初,开垦的农田主要集中在大凌河和辽河流域,而吉林、黑龙江和周边地域,尚有大量未开垦的荒地。但随着关内流民的不断流入和清政府放垦措施的实施,经过清代260多年的垦殖,尤其是经过近代几十年的开发,至清末,东北的河谷平原,已经是阡陌纵横、城镇兴起、 In the northeastern region of our country, in the late Ming and early Qing dynasties, reclaimed farmland mainly concentrated in the Daling River and Liaohe River valleys, while there are still a large number of uncultivated wasteland in Jilin, Heilongjiang and the surrounding areas. However, with the constant inflow of customs and the implementation of the Qing government’s reclamation measures, after more than 260 years of reclamation in the Qing Dynasty, especially after decades of development in the late Qing Dynasty, the valley plains in the late Qing and Northeastern China were criss-cross and the towns were rising ,