Guantong is a very important scholar and thinker in the middle and later periods of Qing Dynasty.

管同是清代中后期一位重要的思想家和学者。

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From then on, the local presents prosperous, becoming an important measure which affected the finance of the middle and later periods of Tang Dynasty.

从此以后，地方进奉长盛不衰，成为影响唐中后期财政的一项重要措施。

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During nearly 300 years, the enormous change had taken place in the scale of population of the Northeast, especially in the middle and later periods the number of population had increased sharply.

历时近三百年，东北地区人口数量规模发生了巨大变化，尤其到中后期人口数量急剧增长。

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