523875。 Shangsha Community, the former residence of the great Dr. Sun Yat-sen, is located in the middle of Chang 'an Town, Dongguan City, Guangdong Province, 90 kilometers north of Guangzhou and 60 kilometers south of Shenzhen. The postal code of this area is 523875, and the provincial highway S358 passes through the area, with convenient transportation and superior geographical position.