Get in touch
Scan to reach our advisors on WeChat or WhatsApp, or message us directly. We help students across China register and prepare for the USABO.
Talk to a USABO advisor
Scan the QR codes below to reach us on WeChat or WhatsApp, or tap the button to start a conversation.
What we can help with
Registration & deadlines
How to register in China, eligibility requirements, deadlines and fees.
Registration details →Exam format & past papers
The 50-question format, topics covered and the Open Exam archive from 2003 onward.
Exam & papers →Preparation & resources
Recommended textbooks, study guides and advice for earning a Gold or Top Gold award.
Prepare →The China region
How BIOUS operates, award tiers by percentile and what sets the China region apart.
China region →Common questions
How do I register?
Registration in China is managed through the BIOUS programme run by ASDAN. Full eligibility requirements, deadlines and fee details are on the registration page.
When is the next exam?
The 2026 Open Exam was held in April 2026. Dates for the 2027 season will be announced later in 2026. Check the registration page for the latest information.
How should I prepare?
Work through past Open Exams from 2003 onward alongside core texts such as Campbell Biology. The resources page has a full reading list and study plan.
We’re here to help
Scan to reach our advisors on WeChat or WhatsApp — we will help you map your path from registration to exam day.
Register now → Preparation resources →