Group 1 - The article discusses the process for reactivating a user's network identity in the electronic tax bureau, including steps for identity verification using UnionPay [2][4][5] - Users must select their document type and enter their document number to proceed with the identity activation [2] - If the user's UnionPay phone number is already in the system, it will be automatically populated for verification; otherwise, users need to manually enter their bank card number and phone number [4][5] Group 2 - The article clarifies misconceptions about stamp duty, stating that not all contracts require stamp duty payment, only those specified in the Stamp Duty Law [11] - It emphasizes that informal agreements or orders between businesses that establish a sales relationship are still subject to stamp duty [14] - The basis for calculating stamp duty should exclude VAT, focusing only on the amounts specified in the contracts [18][22]