Dingxi, commonly known as "Longzhong", is a prefecture-level city under the jurisdiction of Gansu Province, an important node city of the Gansu section of the Silk Road Economic Belt approved by the Gansu Provincial People's Government, and the central city of Longzhong region. By 2019, it has jurisdiction over 1 district and 6 counties, with a total area of 19600 square kilometers. According to the data of the seventh population census, as of 0:00 on November 1, 2020, the permanent resident population of Dingxi was 2524097.

Dingxi is located in the northwest of China, the central part of Gansu Province, and the intersection of the Loess Plateau, the Qinghai-Tibet Plateau and the West Qinling Mountains. It is the regional central city determined by Gansu Province, the core area of the national comprehensive experimental zone for the development of traditional Chinese medicine industry, and the first batch of regional potato breeding bases in China, known as the "gateway of Lanzhou and the throat of Gansu".

Dingxi has a long history and rich cultural tourism resources. Longxi County has a history of more than 2200 years since the Qin Dynasty established it in the Warring States Period. It is the important birthplace of the Yellow River civilization of the Chinese nation, the naming place of Majiayao culture, the place of Li's root-seeking and ancestor worship, the intersection of Qijia, Siwa, Xindian and other prehistoric cultures, and the important collection and distribution center of calligraphy and painting works in China.

In 2020, Dingxi achieved a gross regional product of 44.136 billion yuan, an increase of 4.4% over 2019.