In 2010, when the Chinese internet was still in its infancy, the company began mass-producing and selling sunshades, initially offering only four colors of polyethylene sunshades. Due to the growing demand for high-quality sunshades and services, DER expanded its operations to include both large and small-scale sales of various types of sunshades. Today, DER is a brand targeting mid-to-high-end users and has become one of China's leading suppliers of sunshades, offering polyethylene sunshades, canvas sunshades, hay sunshades, truck sunshades, vinyl sunshades, mesh sunshades, and other types of sunshade covers. DER is headquartered in Chuzhou, Anhui Province, and offers a wide range of sunshades, from emergency-use sunshades to various personal-use sunshades.