Using third-party services to artificially brush QQ business card likes (名片赞) violates QQ's platform rules and carries multiple risks, which are not recommended:

1. Violation of platform terms: QQ strictly prohibits fake interaction behaviors such as brushing likes. Once detected, your account may face penalties like function restrictions, temporary bans, or even permanent closure, affecting normal use.
2. Security risks: Most "low-cost brushing websites" are unregulated. They may steal your QQ account password, personal information, or trick you into paying fees but fail to deliver services (scams). Some may also implant malware to compromise your device security.
3. Unreliable effects: The likes obtained through brushing are usually from fake accounts or bots. They not only cannot bring real social value but may also be cleared by the platform quickly, resulting in a waste of money.
   If you want to increase the number of business card likes, it is recommended to do so in a legitimate way: create interesting content, actively interact with friends and contacts, or participate in QQ community activities—real interaction can make your account more valuable and secure. Please protect your account security and avoid using risky services.