The 2008 Mw 7.9 Wenchuan earthquake occurred along the middle (MS) and northern segments (NS) of the Longmen Shan fault zone at the eastern margin of the Tibetan Plateau.Five years later, the 2013 Mw 6.6 Lushan earthquake ruptured a section of the southern segment (SS) of the Longmen Shan fault zone, leaving a 50-km long seismic gap between the seismogenic structures of the two earthquakes.In our study, we use trenching and calibrated radiocarbon age models to assess the rupture behavior of the gap over multiple earthquakes.At least two paleoseismic events were identified with age constraints between A.D.1350-1830 and 760-525 B.C., respectively.