Donghai County Ruihai Trading Co., Ltd., established in 2015 and located in Lianyungang, China, is a manufacturer and trading company specializing in high-tech materials. With 11 to 50 employees, the company is ISO 9001 certified and operates a factory in Donghai County, known as the "Chinese quartz Center." They are a contract manufacturer primarily focused on quartz glass products for the quartz, semiconductor, fiber, and solar industries. Their extensive product range includes quartz plates, windows, observation windows, various quartz tubes and rods, quartz parts, boats, blocks, cleaning tanks, crucibles, beakers, and specialized quartz tooling for semiconductor applications. They offer OEM and ODM services, customizing products based on customer drawings or requirements. Utilizing high-purity raw materials from domestic sources, GE, and Heraeus, Donghai County Ruihai Trading Co., Ltd. exports a significant portion of its quartz products to Taiwan, Japan, South Korea, the United Kingdom, the United States, Germany, France, and Russia, among other countries. They also produce crystal products and glass smoking pipes.
Qingdao Donghai Aluminum Co., Ltd, established in 2008, is a manufacturer and trading company based in Qingdao, China, specializing in a comprehensive range of aluminum products. Operating from an 18,000 sqm factory with 6 production lines and an annual production capacity of 40,000 tons, the company is ISO 9001 certified and offers OEM services. Their product portfolio primarily includes aluminum foil, strip, sheet, and coil. Aluminum foil is available in various thicknesses (6mic to 100mic) and widths (200mm to 1890mm), with alloys such as 1235, 8011, 8006, and 8079, catering to flexible packaging, household applications, pharmaceuticals, and food containers. They also provide aluminum sheets, strips, and coils in 1, 3, 5, and 8 series alloys. With import and export rights, Qingdao Donghai Aluminum Co., Ltd serves a global market, exporting to over 20 countries across North America, South America, Europe, the Middle East, Africa, and Southeast Asia. The company maintains a 15-person R&D team dedicated to innovation and new product development.