Zhejiang Great Southeast Corp.Ltd engages primarily in the research, development, production, and sale of plastic films and related new materials in China and international markets. Founded in 1975 and headquartered in Zhuji, Zhejiang Province, China, the company operates through its Plastic Film segment, which produces cast polypropylene (CPP) films, biaxially oriented polyethylene terephthalate (BOPET) films, optical grade films, biaxially oriented polypropylene (BOPP) capacitor films, and other base films including PE films; and its Other segment, which manufactures lithium-ion battery membranes, lithium-ion batteries, EVA solar photovoltaic battery encapsulation films, thermal transfer films, as well as packaging solutions for chemical products, medical applications, military materials, agricultural films such as light conversion and gardening films, and biodegradable multi-functional films. Its products serve industries including food packaging, electronics, new energy resources, capacitors, and high-tech applications, with a workforce of approximately 759 employees and listing on the Shenzhen Stock Exchange under ticker 002263.SZ. In recent developments, the company maintains focus on technological innovation and differentiated growth in special membranes, achieving recognition as a national high-tech enterprise and leader in China's polymer film sector, while reporting third quarter 2025 earnings with EPS of CNY 0.002 compared to a prior loss; it continues R&D investments in advanced materials like military VCI anti-rust films, high-temperature resistant electronic insulation materials, and BOPP synthetic paper amid stable operational expansions in domestic and overseas markets.