In recent years. substantial hydrocarbon discoveries have been documented in Member 4 of the Yingcheng Formation (Ying IV) in the northern Songliao Basin. To fully understand the developmental characteristics of the Yingcheng Formation source rocks and clarify the main controlling factors of their formation. this study focuses on typical wells in the Xujiaweizi Fault Depression. https://parisnaturalfoodes.shop/product-category/c-1000/