Will unused data be retained after the package expires?

No. After the package is activated, the validity period is calculated accurately from the "activation time" in N×24 hours (e.g., if activated at 2026-01-01 14:30:00, a 7-day validity period will expire at 2026-01-08 14:30:00). Unused data will be automatically cleared after expiration and cannot be extended or carried over to other packages.