Qiān Zhī Fú () or Bàn Zhī Bá (), or Gàn Zhī Fú (), was a polity recorded in the Chinese sources of the Tang period. It is placed in the Southwest Sea region (), but its identification and location remain disputed. Tatsuo Hoshino places it at Si Thep in the Pasak Basin of central Thailand, while earlier scholarship, notably Paul Pelliot, proposed an identification with Kancipura in southern India. Hoshino further interprets Qiān Zhī Fú as one of the early Siamese polities of the trans-Mekong network and considers its connections with other inland states in the region to have been based partly on overland trade.
By the mid-seventh century, Qiān Zhī Fú was recorded as an independent polity maintaining tributary relations with the Tang dynasty. In 657, it joined four other polities in a tribute mission to the Tang court under the leadership of Zhān Bó, and the envoys brought elephants and rhinoceroses. Hoshino places Qiān Zhī Fú within a network of polities extending across the middle Mekong and connecting the Menam basin with the South China Sea.
The later history of the polity and its relationship with other centres in central and northeastern Thailand are less certain. Various scholars have proposed connections between the political centres identified with Qiān Zhī Fú, Dvaravati, Wen Dan, Lavo and other regional polities, but these reconstructions are not directly established by the Chinese records. In particular, the identification of Qiān Zhī Fú with Si Thep remains a hypothesis rather than a settled identification.
Identification and localization The location of Qiān Zhī Fú and the identification of the names recorded for it remain uncertain. The notice stands in the Nan Man (), or "southern barbarians", chapter of the New Book of Tang, whose sequence runs through Huan Wang, Pan Pan, Funan, Zhenla and Dvaravati. Hoshino reads the Southwest Sea of that chapter as denoting not a sea but the part of mainland Southeast Asia lying south of the Red River basin and Nanzhao, distinguished from the Nan Hai of the middle Mekong. The notice describes Qiān Zhī Fú as a settlement of people from southern India and gives it the alternative name Bàn Zhī Bá, which Hoshino renders "Five Hills". The same passage describes the northern neighbour Duō Mó Cháng, whose ruler is said to command an army of 20,000 men equipped with various weapons but no horses, a figure that concerns that state and not Qiān Zhī Fú.
On the basis of the name "Five Hills", Paul Pelliot tentatively identified Qiān Zhī Fú with Kancipura in southern India, which has a mountain of five peaks. Hoshino rejects this identification and instead places the polity inland, adjoining the Isan region, the neighbouring Mekong valley and Vietnam. He argues that the reference to southern Indians describes the settlement's historical connections rather than its geographical location, and that those connections had already declined by the time the Tang reports were compiled. Hoshino also cautions against the older identifications of the chapter's place names, noting that Pelliot's proposals were provisional and were subsequently adopted by Cœdès without re-examination. He further notes that Pelliot, encountering a passage that did not fit his reconstruction, considered it misplaced and proposed that it belonged in the section on India instead.
The chain of neighbours in the annals provides one line of evidence for the proposed location. Duō Mó Cháng stands immediately north of Qiān Zhī Fú, with Hē Líng () further north. Pelliot and Cœdès identified Hē Líng with a polity on the island of Java, partly because it is placed south of Zhenla and because the Chinese sources also use Du Po for Java. On that reading, however, Qiān Zhī Fú would lie still farther south, at the southern limit of the Chinese geographical world, potentially in open sea or as far as Australia. Hoshino considers this implausible: Australia was not known to the Chinese at the time, the proposed region was not Indianised, and the islands of Southeast Asia contain no river comparable to the Ganges, although the annals place the group including Qiān Zhī Fú south of one.
Hoshino therefore distinguishes two places called Hē Líng. He identifies the northern Hē Líng with a polity around Sipsong Panna, drawing on Pelliot's citation of the biography of Wei Gao, where Hē Líng appears as the second of eight West Mountain chiefdoms that submitted in 793.
The position of Duō Mó Cháng also provides a geographical constraint from the north. The Chinese record states that travel across its territory was more difficult from east to west than from north to south. Hoshino interprets this as describing two or three river valleys separated by north–south mountain ranges, a configuration he associates with Lan Na, including the Yom and Nan basins and tributaries of the Mekong. If Duō Mó Cháng occupied the Yom and Nan basins, Qiān Zhī Fú would have lain in the plain immediately to its south, consistent with Hoshino's proposed location.
The name itself has also been considered. The suffix fú corresponds to the Sanskrit pūra, meaning "town" or "city", an element Hoshino also finds in Phetburi, Chanthaburi, Phetchabun and Si Khottabun. The prefix qiān remains uninterpreted, and no identification with a local name has been established. The term xiān , however, is attested in Chinese and Đại Việt sources for peoples and polities of the Chao Phraya River basin in the early second millennium.
Among the mainland candidates, Hoshino considers Lopburi and Si Thep and prefers Si Thep on three grounds: its sacred hills, the presence of the region's earliest Sanskrit inscriptions, and the quality of the sculpture found in its vicinity. He further identifies the polity with the primordial Canasapura, treating as a regional administrative centre, and cites Dhida Saraya's 1985 study in support of this equation. He describes these identifications as tentative and consistent with the textual evidence rather than established by it, and states that nothing in the reconstruction of the period is certain. On the evidence of the Ratanabimbavamsa and the Jinakalamali, Thai scholars locate Ayojjhapura at Si Thep, the only substantial ancient settlement north of Lopburi. Si Thep has been claimed for another polity as well. Claude Jacques proposed in 2009 that the site was Dvāravatī itself, on the strength of its early cult of Viṣṇu and of Kṛṣṇa, whose legendary capital in Indian literature carries that name. Hiram Woodward reserves judgement on the identification of the other Chinese toponyms with Si Thep, holding that the evidence needs review by specialists in the Chinese sources.
History
Vaishnavite phase: 4th–8th centuries Archaeological evidence indicates that Qiān at Si Thep developed from a prehistoric farming village approximately 2,500 years ago.World Heritage Convention, (2019). "The Ancient Town of Si Thep", Tentative Lists, UNESCO. During the first archaeological phase (c. 4th–5th century CE), the settlement occupied the inner town and had a burial tradition with offerings that indicate cultural interaction with India and communities in the central region and the Mun River basin. By the 7th century, Si Thep had developed a substantial Brahmanical presence, represented by large-scale stone sculptures including the standing four-armed Viṣṇu. The sculpture belongs to a tradition that spread across mainland Southeast Asia and has been associated with a Vaiṣṇava network extending from Arakan to western Java. Scholars suggest that mainland centres participated in the development and circulation of these artistic traditions rather than deriving them from a single source. Other sculptures associated with Si Thep include a Viṣṇu head, a Kṛṣṇa Govardhana, and a fragmentary goddess, while two gold plaques depicting Viṣṇu date to the late 7th or early 8th century.
Written and indigenous traditions provide a separate body of evidence for Si Thep's connections. Local traditions from the western Menam Valley connect Si Thep, mentioned as "Manohana", with other regions. They recount that Siddhijaya Brahmadeva, said to have originated from Si Thep, moved to establish political authority in the area of present-day Nakhon Pathom and maintained close relations with the king of Lanka.
According to descriptions of Qiān Zhī Fú in the New Tang Annals, which correspond to Canasapura (Jiā Luó Shě Fú, ), Tatsuo Hoshino identifies the two polities as the same kingdom during the 7th–8th centuries. He hypothesizes that Qiān Zhī Fú extended eastward into the present-day Chaiyaphum province and further into Nakhon Ratchasima province, encompassing the site at in the 7th century. Local tradition suggests that Qiān Zhī Fú at Si Thep may have established dynastic relations with the coastal polity of Dvaravati at Kamalanka, which placed its southern neighbor, Tou Yuan, between the allied monarchs Dvaravati to the south and Qiān Zhī Fú to the north. Following the Dvaravati annexation of Tou Yuan, refounded as the Lavo Kingdom in 648, Dvaravati expanded into Qiān Zhī Fú's southeastern territory at during the subsequent century, prompting Qiān Zhī Fú to cede control of the Nakhon Ratchasima region and retract to its core territory in the northern Menam plain and Pasak Valley. Consequently, based on Tatsuo Hoshino's theory, Si Thep served as the capital of Canasapura, while functioned as a regional administrative center.
Thai historian Athitthan Chanklom () similarly includes Si Thep within the Canasapura polity. Research by Karen M. Mudar also excludes Si Thep from the Dvaravati sphere. cautions that the evidential basis for Cānāśa itself is narrow, the name being attested in two inscriptions alone, the Bo Ika inscription (K.400) and an inscription of 937 recovered at Ayutthaya (K.949), and in no literary source. These interpretations are consistent with a local tradition preserved in the Legend of Phra Praton, which recounts that Dvaravati once launched an attack against Si Thep in the 7th century, overthrew the reigning monarch Manohanaraj, and carried him into captivity in Dvaravati.
In the aftermath of these conflicts, the Lavo—as successor of Tou Yuan under Dvaravati—engaged in further campaigns against Chenla to the southeast. Tatsuo Hoshino suggests that multiple kingdoms participated in these conflicts, including Cān Bàn and Zhū Jiāng, allied with Chenla, and other minor Siamese–Tai polities, including Si Thep's Qiān Zhī Fú or Gē Luó Shě Fēn, Xiū Luó Fēn, and Gān Bì, whose forces the New Book of Tang puts at 20,000 warriors each for Śrī Canāśapura and Xiū Luó Fēn, 40,000 for the two together, and 5,000 for Gān Bì, and who might align with whichever patron was willing to reward them. The Cefu Yuangui entry for the fifth month of 665, which records a joint arrival of missions, describes Gē Luó Shě Fēn as lying in the southern part of the South Seas and connected on the east with Duoheluo (Dvaravati), names its king as Pujiayuemo and gives it an army of twenty thousand, and states that its envoy set out in 656 and reached China only in 665. The same entry places Xiū Luó Fēn in the northern part of the South Seas, with a city built of wood, Zhenla to the east and the sea to the south, and names its king as Shidamotipo. Some of these engagements may have coincided with early 10th-century conflicts between Lavo and its northern Monic sister kingdom, Haripuñjaya, which weakened Dvaravati and led to the eastern portion of Dvaravati being subordinated to Tambralinga and Angkor in the 10th and 11th centuries, respectively.
Buddhist ascendancy and expansion: 8th–10th centuries