The gas bearing reservoir in Du Qiao Bai of Dong Pu depression is deep-lying reservoir with variableformation water, multi-blocks and complex lithology features.

东濮凹陷杜桥白地区天然气储集层埋藏深、岩性复杂、断块多、地层水变化大。

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Dong Yangxing's Xuan Zhu Du Shi is an important, nowadays-existing book of high quality and with the maximum number of reading-notes on Dufu's poems in Yuan Dynasty.

董养性《选注杜诗》是元代重要的注杜选本，是现存元代注杜诗数量最多、水平极高的一部杜诗学著作。

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