Dongguan Qijin Da Si is a landmark mosque in Xining, Qinghai Province, blending Chinese and Arab architectural styles. Its golden dome and soaring eaves showcase religious culture. The mosque features a meticulous layout, reflecting the fusion of Islam and Tibetan architecture. Key structures include the prayer hall, the Bunkou Tower, and the religious academy. The prayer hall is grand, with a high dome and exquisite interior decorations, including painted murals and intricate carvings. The Bunkou Tower serves as a vital place for religious gatherings. Established in the Ming Dynasty, the mosque has undergone numerous renovations and expansions, becoming a central hub for Tibetan Islam. It embodies religious faith and witnesses the convergence and preservation of diverse cultures. Historically, numerous religious leaders and scholars, such as Ma Yuanzhang and Ma Shurun, have lectured and preached here, contributing significantly to the spread and prosperity of Tibetan Islam. As a landmark of Xining, Dongguan Qijin Da Si is a remarkable religious site and an excellent window for understanding Tibetan Islam and architectural art, attracting countless tourists and scholars seeking its deep historical essence and unique cultural charm.