Buying likes or engagement on platforms like Douyin (TikTok) and QQ Space violates the terms of service of these platforms and carries significant risks:

1. Account Penalties: Platforms have strict anti-fraud mechanisms. Using such services may lead to account restrictions (e.g., shadowbanning, limiting reach) or even permanent suspension.
2. Scam Risks: Many "lowest price" platforms are fraudulent—they may take your money without delivering services, or steal your account information.
3. No Real Value: Artificial likes do not bring genuine followers, interactions, or long-term growth. They can also damage your brand's credibility if discovered.
   If you want to grow your presence on these platforms, focus on creating high-quality content, interacting with your audience, and following the platform's guidelines. This is the only sustainable way to build a real and engaged community.
   Please avoid using such unauthorized services to protect your account and interests.