Group 1 - The article discusses the regulations regarding the deduction of expenses for corporate income tax in China, emphasizing that only expenses directly related to income generation can be deducted [3] - It highlights the distinction between revenue expenditures, which can be deducted in the current period, and capital expenditures, which must be amortized over time [3] - The article specifies that non-taxable income used for expenses cannot be deducted or calculated for depreciation and amortization [3] Group 2 - The article outlines the process for authorized personnel to manage tax declaration permissions through the Natural Person Electronic Tax Bureau [9][10] - It details the steps for granting tax declaration authority to designated individuals, including the need for verification and the selection of authorization duration [14][15] - The article emphasizes the importance of ensuring that authorized personnel are current employees and the need to revoke permissions for those who have left the company [13]