QQ has many free basic services for users. Here are the main ones:

1. Core Instant Messaging: Free to send text, voice messages, photos, videos, make 1-on-1/video calls, and join group chats.
2. QQ Space (Qzone): Basic functions like posting updates, photos/videos, and interacting with friends' posts (like/comment) are free (paid decorations are optional).
3. QQ Mail: Free email service with storage, supporting sending/receiving emails and attachments.
4. QQ Music (Free Tier): Listen to non-VIP songs for free (ad-supported; premium songs need VIP).
5. Casual QQ Games: Many games (e.g., Happy Farm, QQ Speed basic mode) are free to play (in-game items may be paid).
6. QQ Groups: Create/join groups (free for up to a certain number of members; larger groups need VIP) with basic management tools.
7. Basic Profile Customization: Set avatar (free uploads), nickname, signature, etc., at no cost.
8. File Transfer: Free to send files between QQ accounts (basic size limits apply).
9. QQ Wallet Basic: Transfer money to friends, online payments, and wallet management (no fees for basic use).
   Note: Advanced features (e.g., ad-free music, larger groups, premium avatars) require QQ VIP or paid subscriptions. All basic services above are permanently free for all users.
   Is there a specific QQ service you want more details about? 😊