Dongda Sub-district Office. According to the administrative division of Xi, the bamboo garden of relatives' courtyard in Chang 'an Campus of Northwestern Polytechnical University belongs to Dongda Sub-district Office, and the distance between the two places is close, which is convenient for work development and community development and maintenance. Xi 'an, referred to as "Gao", was called Chang 'an and Haojing in ancient times. It is a prefecture-level city under the jurisdiction of Shaanxi Province, and it is the capital, sub-provincial city and megacity of Shaanxi Province.