Core Viewpoint - The company, Ruihua Tai, produces PI films that serve as substrates for flexible printed circuit boards (FPC), positioning itself in the upstream of the FPC industry chain [1] Group 1: Company Operations - The PI films produced by the company are supplied to manufacturers of flexible copper-clad laminates (FCCL), such as Shengyi Technology and Lianmao [1] - FCCL manufacturers utilize these products for precision circuit processing in flexible printed circuit boards [1] Group 2: Industry Applications - The final applications of the company's products are in smart electronic terminal devices [1] - The company does not have direct business relations with Shenghong Technology [1]