• Types: General e-invoice/paper invoice or special VAT invoice.
• Apply: Contact the seller.
• After purchase, it appears automatically in "App → Device List".
• Download the official client (Win/macOS/Linux/iOS/iPadOS/Android) and log in to connect.
• Path: AskLink "Devices" → Right-click menu.
• Renew: Click "Renew", choose duration, and pay.
• Cancel: Click "Cancel"; device is released immediately.
• Auto-renew: Toggle "Auto-Renew" on/off.
• Most system & data disks are persistent by default.
• Confirm with provider for critical data.
• Pausing is not supported; please cancel promptly if unused.