Absolutely. But with a caveat: are not for beginners. If you are not comfortable with calculus-based physics (e.g., Halliday/Resnick/Krane level), start there. However, if you are aiming for the IPhO, or simply want to master physics problem-solving at the highest level, these PDFs are your Rosetta Stone.
If you want, I can also provide:
Filters: [ Year: 2020-2025 ▼ ] [ Level: All ▼ ] [ Topic: Mechanics ▼ ] Chinese Physics Olympiad Problems Pdf
Past contest PDFs may be copyrighted; prefer official releases from organizing bodies or educational institutions. When sharing, respect copyright and usage terms. Absolutely