A special giant impact and its influence on Earth’s core and mantle You Zhou 1,2,3 , Christian Reinhardt 4 , Hongping Deng 4 , Cao Xiaobin 5 , Yun Liu 1,3* 1 State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550081，China 2 Chengdu University of Technology, Chengdu 610059, China 3 CAS Center for Excellence in Comparative Planetology, China 4 Center for Theoretical Astrophysics and Cosmology, Institute for Computational Science, University of Zurich, Winterthurerstrasse 190, 8057 Zurich, Switzerland 5 Department of Geology and Geophysics, Louisiana State University, Baton Rouge, Louisiana 70803. USA Key Points: core-core direct merge, core formation, core-mantle differentiation, giant impact, highly siderophile element, late veneer, ultra-low velocity zones *: corresponding author: Liuyun@vip.gyig.ac.cn