State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China;
University of Chinese Academy of Sciences Beijing 100049 China;
CAS Center for Excellence in Tibetan Plateau Earth Sciences Beijing 100101 China;
Laboratory of Seismology and Physics of Earth''s Interior and School of Earth and Space Sciences University of Science and Technology of China Hefei 230026 China;
Mengcheng National Geophysical Observatory University of Science and Technology of China Mengcheng 233500 China;
Receiver function; Direct P-wave amplitude; S-wave velocity structure; Shallow crust; Northeastern Tibet; Sichuan Basin;