5 18 104。 According to official website information of State Post Bureau, the postcode of Shajing Street in Bao 'an District is 5 18 104. Shajing Street belongs to Baoan District, Shenzhen City, Guangdong Province. Located in the northwest of Bao 'an District, on the east bank of the Pearl River Estuary, it is adjacent to Gong Ming Street in Guangming District in the east, Shiyan Street in the south, Songgang Street in the west and Dongguan City across the river in the north, with an area of 35.79 square kilometers.