Nanzhao (simplified Chinese: 南诏; traditional Chinese: 南詔; pinyin: Nánzhào), also spelled Nanchao, lit. 'Southern Zhao', Yi language: ꂷꏂꌅ, Mashynzy) was a dynastic kingdom that flourished in what is now southwestern China and northern Southeast Asia during the 8th and 9th centuries, during the mid/late Tang dynasty. It was centered on present-day Yunnan in China, with its capitals in modern-day Dali City. The kingdom was officially called Dameng (大蒙) from 738 to 859 AD, Dali (大禮) from 859 to 877 and Dafengmin (大封民) from 877 to 902.

Nanzhao encompassed many ethnic and linguistic groups. Some historians believe that the majority of the population were the Bai people (then known as the "White Man") and the Yi people (then known as the "Black Man"), but that the elite spoke a variant of Nuosu (also called Yi), a Northern Loloish language. Scriptures unearthed from Nanzhao were written in the Bai language.

The Cuanman people came to power in Yunnan during Zhuge Liang's Southern Campaign in 225. By the fourth century they had gained control of the region, but they rebelled against the Sui dynasty in 593 and were destroyed by a retaliatory expedition in 602. The Cuan split into two groups known as the Black and White Mywa. The White Mywa (Baiman) tribes, who are considered the predecessors of the Bai people, settled on the fertile land of western Yunnan around the alpine fault lake Erhai. The Black Mywa (Wuman), considered to be predecessors of the Yi people, settled in the mountainous regions of eastern Yunnan. These tribes were called Mengshe (蒙舍), Mengxi (蒙嶲), Langqiong (浪穹), Tengtan (邆賧), Shilang (施浪), and Yuexi (越析). Each tribe was known as a zhao. In academia, the ethnic composition of the Nanzhao kingdom's population has been debated for a century. Some non-Chinese scholars subscribed to the theory that the Tai ethnic group was a major component and later moved south into modern-day Thailand and Laos. The historiography of the origins of Nanzhao people has attracted much interest.

Among them, Mengshe zhao was recorded as Ma Shizi ( ꂷꏂꌅ ma shy nzy ) in Yi classics, which means "King of Golden Bamboo". Because it is located in the south, Mengshe was called Nanzhao or southern Zhao.

In 649, the chieftain of the Mengshe tribe, Xinuluo (細奴邏, Senola), son of Jiadupang and grandson of Shelong, founded the Great Meng (大蒙) and took the title of Qijia Wang (奇嘉王; "Outstanding King"). He acknowledged Tang suzerainty. In 652, Xinuluo absorbed the White Mywa realm of Zhang Lejinqiu, who ruled Erhai Lake and Cang Mountain. This event occurred peacefully as Zhang made way for Xinuluo of his own accord. The agreement was consecrated under an iron pillar in Dali. Thereafter the Black and White Mywa acted as warriors and ministers respectively. In 655, Xinuluo sent his eldest son to Chang'an to ask for the Tang dynasty's protection. The Tang emperor appointed Xinuluo as prefect of Weizhou, sent him an embroidered official robe, and sent troops to defeat rebellious tribes in 672, thus enhancing Xinuluou's position. Xinuluo was succeeded by his son, Luoshengyan, who travelled to Chang'an to make tribute to the Tang. In 704, the Tibetan Empire made the White Mywa tribes into tributaries, whilst subjugating the Black Mywa. In 712, Luoshengyan established a walled city at Yongchang and in 713, Luoshengyan was succeeded by his son, Shengluopi, who was also on good terms with the Tang. He was succeeded by his son, Piluoge, in 733.

Piluoge began expanding his realm in the early 730s. He first annexed the neighboring zhao of Mengsui, whose ruler, Zhaoyuan, was blind. Piluoge supported Zhaoyuan's son, Yuanluo, in his accession, and in turn weakened Mengsui. After Zhaoyuan was assassinated, Piluoge drove Yuanluo from Mengsui and annexed the territory. The remaining zhaos banded together against Piluoge, who thwarted them with an alliance with the Tang dynasty. Not long after 733, the Tang official Yan Zhenghui cooperated with Piluoge in a successful attack on the zhao of Shilang, and rewarded the Mengshe rulers with titles.

Shige/gupi of Shilang was garrisoning the fort of Shihe, which, it will be recalled, was a little East of the present Xiaguan, at the Southern entrance to the Dali Plain. Shilang forces also occupied the fort of Shiqiao at the Southern end of the Tiancang Shan. While Yan Zhenghui and Geluofeng took Shihe and captured Shigepi, Piluoge himself struck at Shiqiao and prevented reinforcements from Shilang from interfering with what appear to have been the main operations. For having occupied Shihe, Piluoge was well placed to attack the Xier He people of the Dali Plain. Once again victory was his, though some of the conquered people managed to escape and make their way North, where they eventually came under the rule of the Jianlang Zhao at Jian Chuan, which will be mentioned in due course.

— M. Blackmore