Special issue for RAA 20th Anniversary

• Preface: Frontiers in Astrophysics (II) — A special issue dedicated to the 20th anniversary of RAA (2001–2020)

  Jingxiu Wang, Wing-Huen Ip

  

  157

• A brief review on cosmological analysis of galaxy surveys with multiple tracers

  Yuting Wang, Gong-Bo Zhao

  

  158

• The bar and spiral arms in the Milky Way: structure and kinematics

  Juntai Shen, Xing-Wu Zheng

  

  159

• Binary population synthesis

  Zhan-Wen Han, Hong-Wei Ge, Xue-Fei Chen, Hai-Liang Chen

  

  161

• Observational signatures of close binaries of supermassive black holes in active galactic nuclei

  Jian-Min Wang, Yan-Rong Li

  

  160

• The youngest X-ray binaries

  Xiang-Dong Li

  

  162

• Contact binaries at different evolutionary stages

  Sheng-Bang Qian, Li-Ying Zhu, Liang Liu, Xu-Dong Zhang, Xiang-Dong Shi, Jia-Jia He, Jia Zhang

  

  163

• A tale of planet formation: from dust to planets

  Beibei Liu, Jianghui Ji

  

  164

• Magnetic flux ropes in the solar corona: structure and evolution toward eruption

  Rui Liu

  

  165

• Some interesting topics provoked by the solar filament research in the past decade

  Peng-Fei Chen, Ao-Ao Xu, Ming-De Ding

  

  166

• Overview of the LAMOST- Kepler project

  Jian-Ning Fu, Peter De Cat, Weikai Zong, Antonio Frasca, Richard O. Gray, An-Bin Ren, Joanna Molenda-Zakowicz, Christopher J. Corbally, Gianni Catanzaro, Jian-Rong Shi, A-Li Luo, Hao-Tong Zhang

  

  167

• Astronomy from Dome A in Antarctica

  Zhao-Hui Shang

  

  168

Research Papers