有研复材、林平发展上交所IPO提交注册

Group 1 - The core viewpoint of the article is that Youyan Metal Composite Materials (Beijing) Co., Ltd. and Anhui Linping Circular Development Co., Ltd. have submitted their IPO applications for review, with the status changed to "submitted for registration" [1] - Youyan Metal Composite Materials aims to raise 900 million yuan through its IPO, focusing on the research, production, and sales of metal composite materials and special non-ferrous metal alloy products [1] - The main products of Youyan include metal matrix composite materials, bimetallic composite materials, special aluminum alloy products, and special copper alloy products, which are widely used in aerospace, military electronics, smart terminals, and home appliances [1] Group 2 - Anhui Linping primarily engages in the research, production, and sales of corrugated paper and boxboard products, evolving into a resource comprehensive utilization enterprise [1] - The company implements various processes for resource recycling and sustainable development, including waste paper utilization, wastewater treatment, and green manufacturing [1] - Linping's main products, corrugated paper and boxboard, are widely used in logistics transportation and packaging for industrial and consumer goods [1]