Is the tax rate only 1% for 1Panel panel invoices from Lingxia Software?

Yesterday I logged into the backend of Lingxia Software to check the Pro license I purchased, and I saw an entry My Invoices in the menu.

I tried applying for an invoice.

I received the invoice email today, and when I opened it I saw the tax rate is only 1%?

The ticket number is left blank in printing, and it will appear as soon as you scan the QR code.