The "Shaan" in Shaanxi is the abbreviation of Shaanxi Province in China. The word "Shaan" comes from Shaan County in Henan. The west of Shaan County later evolved into Shaanxi.
The name Shaanxi originated from the "dividing and governing of Shaanxi" by Zhou and Zhao during the Zhou Dynasty. The area around Zhangbian Plateau in present-day Shaan County (Sanmenxia, ??Henan) was called Shaanxi in ancient times. Shaanxi at that time was to the west of Shaanxi. The Jingwei Plain. After the Anshi Rebellion in the Tang Dynasty, Shaanxi Jiedushi was established, and Shaanxi was transformed into the name of an administrative region. Shaanxi Road was established in Song Dynasty. Take the word "Shaan" in the full name as the abbreviation.
Extended information:
Shaanxi Province is one of the provincial administrative units in China, with the provincial capital Xi'an. Located in the hinterland of the northwest inland, it borders Shanxi and Henan to the east, Ningxia and Gansu to the west, Sichuan, Chongqing and Hubei to the south, and Inner Mongolia to the north.
Shaanxi straddles the middle of the two major river basins of the Yellow River and the Yangtze River, between 105°29′-111°15′ east longitude and 31°42′-39°35′ north latitude. The natural division is due to the Qinling- The Huaihe River stretches across the north and south, with a total area of ??205,800 square kilometers. It is the origin of the People's Republic of China and the location of the National Time Service Center of the Chinese Academy of Sciences.
Shaanxi is one of the important birthplaces of the Chinese nation and Chinese culture. In ancient times, it was Yongzhou and Liangzhou. It was the hometown of Emperor Yan and the burial place of Emperor Huang. Shaanxi has been the place where emperors established their capitals since ancient times. 14 dynasties, including Western Zhou, Qin, Western Han, New, Eastern Han, Western Jin, Former Zhao, Former Qin, Later Qin, Daxia, Western Wei, Northern Zhou, Sui and Tang, established their capitals in Shaanxi.
Four of China's nine unified dynasties (Qin, Western Han, Sui, and Tang) established their capitals in Xi'an (Xianyang), leaving behind a total of 79 imperial tombs, known as the "Oriental Pyramid" ".
Baidu Encyclopedia-Shaanxi