贝斯特新材料冲刺港股上市，前三季度收入增长但毛利率下滑

Group 1 - The company Best (300580) is aiming for an IPO on the Hong Kong Stock Exchange, with Guotai Junan International as the exclusive sponsor [1] - The company has submitted its listing application, and subsequent processes such as hearings and pricing will be key points to monitor [1] Group 2 - The company's revenue showed growth in the first three quarters of 2025, but the overall gross margin has declined [2] - The research and development expense ratio has also decreased, which may affect market attention [2] - High customer concentration and increasing industry competition are potential concerns [3]