Hi, everyone.
The first stage of the IOI 2025 China Team Selection has ended today. The top 50 participants from the 2025 National Olympiad in Informatics (NOI) will compete for a spot on the Chinese national team for IOI 2026.
The rule of selecting CHN team this year:
- Homework (10%). The participants are asked to choose 4 tasks for homework and complete 60 tasks of them.
- First stage (CTT; 54%; Dec 2, 2024 — Dec 4, 2024): three contests in classic olympiad format, where each contest worthes 18% of the score. Top 30 participants will advance to the final stage.
- Final stage (CTS; 36%; Feb 10, 2026 — Feb 12, 2026): two contests in classic olympiad format, where each contest worthes 18% of the score.
The current scoreboard can be found here.




