Located between the Dongguan City Tower and the ancient canal. In September 1999, the site of the East Gate of Song Dacheng was found at the construction site of Dongguan Streetkou. The site of the East City of Song Dynasty was found between the East City Wall of Tang and Song Dynasty and the East City Wall of the Ming Dynasty. It is proved that the East Gate of Song Dacheng was built by the water. The structure of the East Gate of Song Dacheng is consistent with the historical records.