The Long Sinuous Rille System in Northern Oceanus Procellarum and Its Relation to the Chang'e‐5 Returned Samples

China's Chang'e-5 (CE-5) mission recently returned samples from a young intermediate-Ti mare unit (Em4/P58, ∼1.5 Ga) in Northern Oceanus Procellarum. Rima Sharp, previously mapped as the longest lunar sinuous rille, is most prominent volcanic feature associated with landing region. Our analysis shows that Sharp not single but instead composed of two separate rilles (Rima originating North Vent, and Mairan South Vent), meeting at ∼40.40°N, 48.38°W. Both vent have characteristics suggesting relatively low magma volatile contents. lavas (southeast Em4/P58), embay are slightly younger than Sharp. Rille formation largely influenced by pre-existing topography (earlier surface, proto-wrinkle ridges, highlands); deposits experienced post-formation deformation (wrinkle subsidence). CE-5 probably originate mainly Sharp's source vent, may represent both rilles.