Core Insights - The article discusses the development and production of energy-saving building materials in China, highlighting their importance in reducing energy consumption and carbon emissions in the construction industry [1][3]. Group 1: Overview of Energy-Saving Building Materials - Energy-saving building materials are designed to improve insulation, heat resistance, and shading, thereby reducing energy consumption in buildings [1]. - Key applications include insulation and heat-resistant materials used primarily in wall construction, as well as shading materials for building exteriors [1][2]. Group 2: Production Statistics - The production of thermal insulation materials in China began to increase significantly from 2016, with a notable rise in 2017 due to government policies [3]. - In 2021, the production of thermal insulation materials reached approximately 8.5 million tons, representing a year-on-year growth of 10.4% [3]. - The production continued to rise to 8.65 million tons in 2022, but is expected to decline in 2023 before recovering to 2022 levels in 2024 [3]. Group 3: Classification of Insulation Materials - Building insulation materials in China are classified into four fire resistance levels: A (non-combustible), B1 (flame-retardant), B2 (combustible), and B3 (easily combustible) [4]. - A-level materials are primarily inorganic, including rock wool and glass wool, while B-level materials are organic [4][6]. Group 4: Low-E Glass Development - Low-E glass, or low-emissivity glass, features a multi-layer metal or compound coating that enhances thermal insulation and light transmission compared to traditional glass [8]. Group 5: Shading Materials Development - Building shading involves installing facilities that block or regulate sunlight entering buildings, crucial for managing indoor temperatures and energy loads [10]. - Shading facilities can be categorized into external, internal, and middle shading, each with distinct advantages and disadvantages [10].