Register for the USABO in China
High-school students in China can sit the USA Biology Olympiad through the independent China region, BIOUS — the same papers, the same judging standard, at your own school.
High-school students in China
The USABO China region is open to students in Grades 9–12 studying in China. Registration is coordinated through a partnering school or an authorised ASDAN / BIOUS centre — students do not register independently.
The exam is taken on paper at your own school on the announced date. An online option may be available on request. There are no citizenship requirements for the China-region exam.
When to register
The 2026 Open Exam was held on April 4, 2026, with China-region registration closing on March 24, 2026 — that season is now closed. Registration for the 2027 season opens later in 2026; exact China-region dates are announced each season. Register your interest now to be notified as soon as the 2027 window opens.
Registration closed
Registration deadline was Mar 24, 2026. The Open Exam was held Apr 4, 2026. Results and awards are now issued.
Registration opening soon
China-region registration for 2027 opens later in 2026. Exact dates are announced each season — register your interest to be notified.
Start preparing now
Past Open Exam papers from 2003 onward are available now. Use the off-season to prepare — see the exams page and resources.
Refund policy
If you withdraw before the registration deadline, 25% of the registration fee is retained as an academic-materials and service fee. If you withdraw after the deadline, no refund is available.
Contact your school coordinator or ASDAN centre for the exact registration fee for your location and season.
Students who participate in the ASDAN EPQ (Extended Project Qualification) alongside BIOUS may earn additional scholarship bonuses on top of their USABO award:
EPQ bonus awarded to eligible ASDAN EPQ participants. Ask your coordinator for eligibility details.
Four steps to the exam
Registration is handled through your school or an authorised ASDAN / BIOUS centre. Here is what to expect.
Register through your school
Contact your school coordinator or find your nearest authorised ASDAN / BIOUS centre. Individual student self-registration is not available.
Confirm details and pay
Complete your registration form, verify your details, and pay the registration fee before the season deadline. Late registrations cannot be accepted.
Sit the Open Exam
On the announced exam date, sit the 50-question, 50-minute paper at your school. The exam is in English, on paper, with no negative marking.
Receive your award
Results and China-region awards are issued by percentile: Top Gold (top 5%), Gold (top 15%), Silver (top 30%) and Bronze (top 45%). See past results →
Talk to us to get started. Not sure whether your school is a partnering centre, or want to bring BIOUS to your school? Message us on WhatsApp → and we will guide you through the process.
Register your interest today
The 2027 registration window will open later in 2026. Reach out now and we will contact you as soon as registration opens, answer any questions about eligibility, and help your school prepare.
Use the off-season to prepare: past Open Exam papers from 2003 onward are available, and our resources page has study guides and recommended textbooks.
Register your interest
Tell us your school and grade and we will confirm eligibility, answer your questions, and notify you the moment the 2027 registration window opens.