Objective Ensure to provide a relative real figure of malaria prevalence in Tongbai County, the southern part of Henan and evaluate current epidemic situation in the area.
目的掌握豫南桐柏县的疟疾真实发病情况，评估疟疾在该区域的流行现状。
There is much sajang meadow soil in central and southern area of Henan province.
砂姜黑土广泛分布于河南省的中南部地区，是影响农业低产的主要旱作土壤之一。
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