Xinjian county (Xinjian county) generally refers to Xinjian District.

Xinjian District, located in the northwest of Nanchang City Center, belongs to Nanchang City, Jiangxi Province. It is a "thousand-year old town" with cultural gathering and enjoys the title of "The Hometown of fish and Rice". Ganjiang River in the east, Xishan Mountain in the west, Poyang Lake in the north, Fengcheng City and Gao 'an City in the south. The district covers an area of 2121.1 square kilometers, with jurisdiction over 15 towns and streets and 1 economic development zone. In 2021, the newly built area will have a registered population of 642,900.

The new district is located in the main expansion area heading west of the capital city of Nanchang. Changling Street, the seat of the new District's people's government, is across the river from the main city of Nanchang. With the advancement of the development pattern of "two sides of one river" in Nanchang and the construction of Nanchang's Red Gutan District, the new district has become the new urban area of Nanchang.

In 2021, the GDP of the newly built areas reached 39.338 billion yuan, an increase of 8.8 percent over the previous year. The added value of the primary industry was 5.523 billion yuan, and that of the secondary industry was 16.886 billion yuan; The added value of the tertiary industry was 16.929 billion yuan, and the tertiary industry structure was 14.0:43.0:43.0.