Specimens of Yulong were collected near Qiupa Town in Luanchuan County, Henan Province, from the Qiupa Formation. The exact geological age of the Qiupa Formation is unknown, but it probably dates to the Late Cretaceous based on the presence of oviraptorids (Yulong), dromaeosaurids (Luanchuanraptor), ornithomimids (Qiupalong) and other, undescribed, derived dinosaur specimens.