Group 1 - The article provides various online channels for taxpayers to independently access tax policies and knowledge, including the National Taxation Administration's website and its 12366 tax service platform [1][2] - The National Taxation Administration's new media platforms, such as WeChat and Weibo, offer tax policy interpretations and educational videos, allowing taxpayers to stay updated on tax-related information [3] - The Shanghai Municipal Taxation Bureau's website serves as an official information and service platform, featuring a 24/7 intelligent consultation system for tax policy inquiries [5] Group 2 - The Shanghai Municipal Taxation Bureau's new media platforms, including WeChat and Weibo, provide resources like the Shanghai Taxpayer Classroom and visual Q&A platforms for taxpayers to learn about tax regulations [7][8] - The Shanghai Taxpayer Classroom conducts live courses on the latest tax policies and offers short video tutorials on various tax topics, enhancing taxpayer education [7] - The visual Q&A platform addresses common tax-related questions and operational difficulties, available through both web and mobile access [8][9] Group 3 - The article discusses the differences between depreciation and amortization in corporate income tax, highlighting that depreciation applies to tangible assets while amortization pertains to intangible assets and long-term expenses [14][15] - Depreciation is calculated based on the asset type, with minimum depreciation periods set by tax laws, such as 20 years for buildings and 10 years for machinery [16][17] - Amortization begins from the month an intangible asset is acquired, ensuring that its value is allocated over its useful life, typically not less than 10 years if no legal or contractual term is specified [17][18]