Olympiads
Chinese National Astronomy Olympiad (CNAO)
Problems in the Final Rounds of CNAO (2002-2020) (zh-CN)
Problems in Final Round of CNAO 2021-2022 (zh-CN)
Video for Problem 3 in Final Round of CNAO 2021-2022 (zh-CN)
International Olympiad in Astronomy and Astrophysics (IOAA)
IOAA Problem Book (2007-2021) (en)
IOAA 2022 Problems and Solutions (en)
A Problem Book in Astronomy and Astrophysics (en)
Theoretical & Data Analysis Problem Set of IOAA (2007-2022) (zh-CN)
International Astronomy Olympiad (IAO)
IAO Problem Set (1996-2021) (zh-CN)
Training Materials
Some of the materials I've used.
Guangdong Provincial Competition (GPC)
Training for First Round GPC 2020 (zh-CN)
Preparation for GPC-2020–Selection of Problems from Previous GPC and CNAO First Round (zh-CN)
Training for Second Round GPC 2020 (Handout) (zh-CN)
Training for Second Round GPC 2020 (Answer to Handout) (zh-CN)
Simulation for Second Round GPC 2020 (Data Analysis) (zh-CN)
Answer to Simulation for Second Round GPC 2020 (Data Analysis) (zh-CN)
Problem Set of Data Analysis Problems in Astronomy Olympiads (zh-CN)
Final Round CNAO & Selection for National Training Camp
Final Round CNAO & Selection for National Training Camp (zh-CN)
Final Round CNAO & Selection for National Training Camp (Handout) (zh-CN)
Introductory Cosmology for Babies (zh-CN)
Astronomy Olympiad: Fundamentals of Cosmology (zh-CN)
International Olympiads
International Astronomy Olympiads - Introduction, Problems and Off-topic Questions (zh-CN)
International Astronomy Olympiads - Introduction, Problems and Off-topic Questions (Handout) (zh-CN)
Other Materials
Spherical Trigonometry (zh-CN)
Problems — HFAA’s Trip to M31 (zh-CN)
Problems — HFAA’s Trip to M31 (Solution) (zh-CN)
Other Learning Materials
Amateur Astronomers Supplement A (zh-CN)
Amateur Astronomers Supplement B (zh-CN)
Useful Tools
Table of Constants (from Fundamental Astronomy, Sixth Edition)