连 Lian (ClassGame) is a free, open-source interactive Chinese vocabulary learning platform designed to make Mandarin study engaging, effective, and accessible to everyone — from absolute beginners to advanced HSK exam candidates.

Learning Chinese vocabulary is one of the biggest challenges for language learners. Traditional flashcard apps can feel repetitive and demotivating. ClassGame tackles this problem by turning vocabulary study into genuinely fun gameplay, while maintaining the rigor needed for real HSK exam preparation.

The platform covers all HSK levels 1 through 9, giving access to over 11,600 vocabulary words. It requires no account creation, no subscription, and contains zero advertisements — it is completely free, forever.

Key Features:

3 Vocabulary Games:

Grid Connect (连字格) — A 4×4 grid game where you tap matching word pairs to clear them. Each session is timed, and completing a board triggers a confetti celebration. Great for quick daily practice sessions.

Line Sort (排行) — A drag-and-drop puzzle where shuffled words must be arranged into rows, with each row containing only one word group. This game strengthens recognition of word categories and groupings.

Group Solitaire (接龙) — A patience-style card game where you build foundations for each word group in the correct order, inspired by classic solitaire mechanics. Ideal for deeper, longer study sessions.

All three games support: Pinyin toggle to show or hide pronunciation guides, English translation toggle, Hidden Mode for extra challenge, color-coded word groups for visual learning, and automatic progress saving via localStorage so sessions are never lost.

HSK Dictionary:

The built-in dictionary covers all 11,600+ HSK 1–9 words. You can search by Chinese characters, pinyin, or English meaning. Words can be filtered by HSK level. Each entry features stroke order animation powered by hanzi-writer, and text-to-speech pronunciation via the Web Speech API.

Text Reader & Analyzer:

Paste any Chinese text into the reader and get an instant tokenized analysis. Click any word for an inline definition popup. Unknown words can be saved to a personal vocabulary list and exported as TSV for use in Google Sheets or other tools. HSK-level highlighting lets you visually assess the difficulty of any text at a glance.

Word Set Selection:

Daily Word Set: auto-generated each day for fresh daily practice. Five built-in proficiency levels from Beginner to Expert. Import Custom: paste a JSON word group or use a built-in AI prompt template to generate your own custom word sets.

Who is ClassGame for?

Chinese language self-learners at any level. Students preparing for HSK 1–9 exams. Teachers who want interactive, no-setup classroom vocabulary activities. Anyone who wants to study Mandarin in a more engaging, game-based way.

ClassGame is built with modern web technologies and runs entirely in the browser. No installation required, no backend accounts, no paywalls. Just open the URL and start playing. It's the ideal tool for daily vocabulary review, exam prep sprints, or classroom warm-up activities.

The project is actively maintained and was built with a deep love for both language learning and game design. It represents a genuine attempt to solve the problem of vocabulary retention in Chinese — the language with one of the most demanding vocabulary requirements for fluency.