The Jiao-Liao-Ji belt is one of three major Paleoproterozoic orogenic belts within the North China Craton, yet its tectonic evolution remains controversial. To address this, we investigated the crustal structure using receiver function analysis of 38 broadband seismic stations from profile NCISP-10, which traverses the Liaodong region in the northeastern North China Craton. Our results reveal that: (1) the Moho depth beneath the profile is 32–34 km and the average crustal Vp/Vs ratio is ∼1.75, c