The merchant stratum was the characteristic social group of central Shanxi.
商人阶层是晋中地区最具特色的社会群体。
Oil of Jurassic and Cretaceous stratum in South central section comes from Wuerhe hydrocarbon source rock, and belongs to the mature crude oil.
中南段侏罗系和白垩系的油属于偏腐殖型成熟原油，来自乌尔禾组烃源岩。
Oil of Jurassic and Cretaceous stratum in South central section comes from Wuerhe hydrocarbon source rock, and belongs to the mature crude oil.
中南段侏罗系和白垩系的油属于偏腐殖型成熟原油，来自乌尔禾组烃源岩。
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