Geda Lou, also known as the Knotty Building, is a colonial townhouse built in 1937, located in Tianjin, China. This architectural gem reflects the rich history and cultural fusion of the city, showcasing a blend of Eastern and Western design elements. It stands as a testament to the architectural grandeur of a bygone era and is part of the Five Great Avenues, a district renowned for its well-preserved collection of Western-style buildings. Visitors to Tianjin often explore this area to admire the unique architectural styles and the historical significance they represent.