Located in Lunzhen Industrial Park in Yucheng City in Shandong Province., Yucheng Delong Auxiliary Co., Ltd. is a limited liability company founded in 2010, with an area of 11,267 square meters and a registered capital of CNY 21 million.

Now, we are mainly engaged in the production and sales of refined naphthalene (pure white refined naphthalene, coking refined naphthalene, petroleum refined naphthalene, liquid refined naphthalene), solid naphthalene as well as the import and export business of goods. With an annual output of 8,000 tons of refined naphthalene, Delong is one of the main manufacturers in China. Since our establishment, Delong has attached great importance to the development and application of technology and process, and the investment in equipment and product development. At present, our high-purity refined naphthalene products sell well both at home and abroad.

Delong has always regarded product quality as the number one priority, honest business for development, and meeting customer needs as our responsibility. Adhering to the business philosophy of "customer first, forge ahead", and insisting on such principle of "customer supreme", Delong strives to provide our customers with excellent services. We sincerely welcome new and old customers to communicate and negotiate business.