• Types: general e-/paper invoice or special VAT invoice.
• Apply: contact the seller.
• After purchase, it appears automatically in "App → Device List".
• Download official client (Win/macOS/iOS/Android) and log in to connect.
• Path: AskLink "Devices" → right-click menu.
• Renew: click "Renew", choose duration and pay.
• Cancel: click "Cancel"; device releases 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; cancel promptly if unused.