For any questions about payments, unlocking, refunds, or content, email us — we usually reply within 2 business days:

📮 contact@fncuthdert.com

  • Site: 临界 · The Critical Point (fncuthdert.com)
  • Operator: Guo Qing
  • For payment issues, please include the transaction ID from your Stripe receipt so we can locate it quickly.

Business inquiries and republication requests: same email.