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Study what the real exams test most · based on 7 papers and 333 questions
Chinese-paper questions mark common exam phrases. Start with this knowledge point's explanation and practice.
角 α 的终边经过点 P(−3, 4)，结论中（ ）
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Do 24 questions and immediately see what to review, what you already know, and how many points you can gain.
One question short of 60% — start with functions
Fix this first: 3.8 Logarithms and Logarithmic Functions (it appeared in 16 real-exam questions, and you missed 2 here)
See a full report example →Each section starts with a few short questions; the parts you know are skipped and you study only what you don't.
4.2 Trigonometric Functions · Start with 4 short questions
Ask at the step you don't follow. The AI explains step by step using this textbook section and points to where it appears so you can go back.
Can't read a Chinese question? Tap it for pinyin, English, and your native language. Taking the English paper? Explanations and practice come in English.
Read the question first
已知角 α 的终边经过点 P(−3, 4)，则下列结论中不正确的是（ ）
Same question, in English
Given that the terminal side of angle α passes through P(−3, 4), which of the following is NOT correct? ( )
Each section is split into small segments, each with three steps: understand, walk through an example, do one question. You know right away if you got it.
Segment 1 · Evaluate at a terminal point
Example: the terminal side of angle β passes through Q(5, −12). Find sin β.
Given the terminal side passes through Q(−3, 4), cot β = ?
Pass the section test to earn a stamp; a perfect score can generate a shareable certificate. Watching your stamps grow keeps you going.
Chapter 4 · Trigonometric Functions stamps
Perfect score on the 4.2 quiz (10/10) — you earned the full-mark stamp! Collect 2 more to unlock the chapter seal
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No. It ranks each knowledge point by how often it appears in the 7 real papers, then cuts the list to the time you have. The real AI tutor lives on knowledge-point pages and answers only about the segment you're studying.
No. We're an independent exam-prep platform and are not affiliated with the official organisers. Registration, exam dates, and results follow the official site and your target school.
No. What we guarantee is that you won't relearn what you already know, and you'll keep working on what you don't until you pass the final test.
Yes. All three subjects are open: knowledge-point explanations, practice, level tests and mock exams all work, and you buy per subject.
Yes. Explanations come in Chinese and English, and practice and final tests can be taken in either; Chinese vocabulary hints are reduced for the English paper.
Not yet. Professional Chinese is about as hard as HSK 5, and finishing HSK 5 is usually enough to pass it. Still, in Mathematics, Physics and Chemistry the subject terms in the explanations and questions are all marked: open one and you see its pinyin, its English and what it means in your language. Words you open, and words you don't know when you get a question wrong, go into the wordbook automatically and come back for review on a schedule. When you take a science paper in Chinese, those words are exactly what you need.