汉族地区在农业生产方面，依照二十四节令的规律安排生产，成为习惯。

Han areas in agricultural production, in accordance with the laws of 24 seasonal arrangements for production and become a habit.

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而且研究对象多集中在汉族地区和城市学校学生，研究工具也不够科学规范。

Furthermore, the object of study concentrated in the school students of the Han regions and cities and research tools is not enough scientific and standardized.

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维持对非汉族缓冲地区的控制

maintain control over the non-Han buffer zone;

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