User Agreement and Public Offer
This is a translation. In case of discrepancies, the Russian version prevails.
Version 1.0 of October 25, 2026
1. General provisions
1.1. This Agreement is concluded between Alisa Pavlovna Arseneva, self-employed (professional income tax payer), Taxpayer ID (INN) 504724549300 (the "Provider", "we") and you, a user of the Telegram bot @lbchinese_ai_bot and the LinguaBridge "Chína" mini app (the "User", "you"; the bot and mini app together, the "Service").
1.2. This Agreement is a public offer within the meaning of article 437 of the Civil Code of the Russian Federation. You accept it when you tick the consent box in the mini app. A paid subscription is accepted at the moment of payment.
1.3. Provider contacts:
- Telegram @LingBridg;
- support in the bot: /feedback and /paysupport.
2. What the Service is
2.1. The Service helps you learn Chinese following the HSK 3.0 curriculum. It includes:
- lessons, word review, tests and mock exams;
- chatting with the character Chína;
- an AI teacher and essay checking;
- a text scanner;
- the "Chinese for Life" section;
- leaderboards and packs.
2.2. Replies from Chína and the teacher, exercise checks and exam scores are generated by artificial intelligence. They may contain inaccuracies and are not an official HSK or HSKK assessment or professional advice. The Service does not guarantee that you will pass an exam and does not promise any specific learning timeline.
2.3. The Service is not affiliated with Chinese Testing International (汉考国际 / CTI) and is not an official HSK representative.
3. The free tier and "Chína Premium"
3.1. The following are available free of charge with no time limit:
- the lesson of the day and review;
- the dictionary;
- chatting with Chína within the daily limit.
3.2. A "Chína Premium" subscription unlocks the remaining features. Their list and prices are shown in the "Premium" section of the mini app and via the /terms command.
3.3. Prices as of the date of this version:
| Payment method | Month | Year |
|---|---|---|
| Bank card via Tribute | 490 ₽ | 3,490 ₽ |
| Telegram Stars | 290 ⭐ | 2,050 ⭐ |
The applicable price is the one shown before payment. We may change prices. New prices apply to new payments and renewals, and you will be informed in advance.
3.4. The monthly Telegram Stars subscription renews automatically every 30 days until you turn it off. You can turn off auto-renewal:
- with the /pay command → "Turn off auto-renewal";
- in Telegram: Settings → My Stars.
The annual subscription is a one-time payment. The terms for card payments (one-time or renewing) are shown on the Tribute payment page before you pay.
3.5. After you turn off renewal, Premium keeps working until the end of the paid period.
3.6. Trial periods and gifted Premium (for inviting friends, prizes, codes) are provided free of charge for the stated period. When it ends, you are not charged automatically.
3.7. Refunds. If you have not used Premium, or it did not work through the fault of the Service, you can get your money back by requesting it via /paysupport within 14 days of payment:
- Stars payments are refunded in Stars;
- card payments are refunded via Tribute to the same card.
All other cases are handled in accordance with the Law "On Protection of Consumer Rights".
3.8. We issue a receipt in accordance with tax law.
4. Rules of use
4.1. You agree:
- not to use the Service for illegal purposes;
- not to send offensive or illegal content or other people's personal data;
- not to try to hack the Service or bypass its restrictions;
- not to resell access.
4.2. In leaderboards and packs, the first word of your name, your HSK level and your points are visible. You can hide yourself from the general leaderboard in the "Competitions" section. Pack names must not be offensive. We may remove such a name.
4.3. Your reviews may be shown to other users in the mini app: the first word of your name, your level and the review text. You can ask us to remove a review via /feedback.
4.4. If you break these rules, we may restrict your access to the Service.
5. Intellectual property
Learning materials, texts, design, images of the character Chína and the software code belong to the Provider or are used by the Provider lawfully. You may not copy or distribute them without permission.
6. Liability
6.1. The Service is provided "as is". We do our best to keep it running without interruptions, but we are not responsible for outages of Telegram, payment services, artificial intelligence services or the internet.
6.2. Our liability is limited to the amount you paid for the last paid period.
7. Personal data
Personal data is processed under the Personal Data Processing Policy and on the basis of a separate Consent to the Processing of Personal Data.
8. Changes and disputes
8.1. We may change this Agreement. The new version is published in the mini app and takes effect when it is published.
8.2. Disputes are resolved through negotiation. You can send a claim via Telegram @LingBridg; we reply within 10 business days. If no agreement is reached, the dispute is settled in court under the laws of the Russian Federation.