SCG(SH:600170) Jin Rong Jie·2025-08-16 06:13Group 1 - Shanghai Construction Fourth Engineering Group Co., Ltd. applied for a patent titled "A Lifting Device for Adjusting Acoustic Effects in Theaters," published as CN120486614A, with an application date of May 2025 [1] - The patent describes a lifting device that includes installation brackets fixed to both sides of a building wall, connected by rods and equipped with acoustic felt, which can be adjusted using tubular motors controlled by an electrical system [1] - The device aims to enhance the acoustic effects in theaters by allowing the acoustic felt to be raised and lowered, thus providing a flexible solution for sound management [1] Group 2 - Shanghai Construction Fourth Engineering Group Co., Ltd. was established in 1993 and is primarily engaged in the housing construction industry, with a registered capital of 1 billion RMB [2] - The company has made investments in 26 enterprises and participated in 5,000 bidding projects, showcasing its active role in the construction sector [2] - The company holds a total of 1,308 patents and possesses 1,073 administrative licenses, indicating a strong focus on innovation and compliance within the industry [2]