According to the record of some documents, there is direct contact between the district of Liaoxi and the central plain area as far back as five-emperor times.
根据文献的记载，辽西区远在五帝时代就与中原地区有了直接的接触。
The four lakes area(Sihu area) is situated in the central part of Jianghan Plain, Hubei province.
四湖地区是江汉平原的中心地带，也是国家和湖北省重要农业生产基地。
Proposes that for central plain area using water source heat pump unit, solving the issues of irrigating well water back for different geological area must be emphasized.
同时提出了中原地区使用水源热泵机组时，着重注意不同地质井水回灌的解决问题。
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