A beautiful knot on Silk Road

Between 121 BC and 111 BC, Emperor Wu (156-87 BC) set up four counties to the west of the Yellow River (Hexi Corridor), Jiuquan, Wuwei, Zhangye and Dunhuang, in today’s Gansu province, to expand the influence of the Han central government and develop ties with countries in xiyu (western regions), which were west of the Yumen Pass in today’s Central Asia.

As a result, the national postal system of the Han Dynasty (206 BC-AD 220), acting like a network of blood vessels, expanded to help improve the communication between the central government and the grassroots ones on its northwestern border.

The postal system of the Han Dynasty consisted of three tiers — ting, you, and zhi. Tings were usually set up every two and a half kilometers, providing a place for passengers and envoys to rest on their journey. The distance between two yous was around 15 kilometers, the longest distance a man could cover by foot in a day. A zhi was the biggest post station, set up around every 40 kilometers, the distance a horse-drawn carriage could reach in a day.

According to the jiandu records unearthed from the Xuanquanzhi Ruins, more than 80 zhis were established between Chang’an and Dunhuang, with Xuanquanzhi being one of them. “Although in the historical records of the Han Dynasty, Yulizhi was to the east of Xuanquanzhi and Zheyaozhi to its west, archeologists have only found Xuanquanzhi after countless investigations in Dunhuang,” Rong said.

Covering an area of 22,500 square meters, Xuanquanzhi featured a defense area, an office area, a reception area, a stable, a horse doctor’s clinic, a mill and a restaurant.

Sitting on the Hexi Corridor that connected ancient China and xiyu countries, the post house functioned for more than 400 years (from the 2nd century BC to the 2nd century AD) as a hub that delivered mail and official documents, as well as hosting envoys and foreign guests.

“The Xuanquanzhi Ruins are so far China’s largest, best-preserved posthouse with the most unearthed cultural relics in the Han and Jin Dynasties (206 BC–420 AD),” said Zhang Defang, founding director of the Gansu Jiandu Museum, which houses more than 40,000 slips unearthed in the northwestern province.

Cultural relics unearthed from the Xuanquanzhi Ruins — clockwise from the top left: a scrap of paper featuring handwritten characters, a paint brush, a lacquer erbei (ear cup), a wooden comb, a leather shoe, a scrap of silk and a writing brush. [Photo/Courtesy of the Xuanquanzhi Cultural Relics Management Office]

A treasure trove of artifacts

More than 35,000 wooden and bamboo slips were unearthed from the Site of Xuanquanzhi. Among them around 23,000 bear characters, and scholars have identified 18,000 of these.

The slips unearthed from the Xuanquanzhi Ruins span 218 years, with the earliest written in 111 BC and the latest in 107 AD. They contain an ocean of information, including politics, economy, military affairs, culture, nationality, society and daily life on the border.

“Xuanquan slips are especially hailed by historians for recording the bureaucratic minutiae of the ancient postal system and the cultural exchanges between China and the West. They serve as original records of and testaments to the prosperity of the Silk Road during the Han Dynasty,” Zhang remarked.

“In addition to being first-hand information for modern people to study the historical origin of the Silk Road, Xuanquan slips can also help complement what the canonical texts of the period failed to record, or correct mistakes in such books,” the veteran scholar added.

The Imperial Edict: Fifty Decrees in the Twelve Months of Four Seasons [Photo/Courtesy of the Xuanquanzhi Cultural Relics Management Office]

Apart from the colossal amount of slips, a wall epigraph called The Imperial Edict: Fifty Decrees in the Twelve Months of Four Seasons is a highlight excavated from the posthouse ruins. Dating back to 6 AD, the fifth year under the reign of Emperor Ping of the Western Han Dynasty, the edict listed all the musts and must-nots regarding agriculture, forestry, fishery and animal husbandry during every month.

“Identified as the earliest legal document focusing on the relationship between human activities and the natural environment, the edict is considered by experts as China’s first environmental protection law,” Rong said.

Yuan’s Letter to Zifang, is a personal letter written on silk [Photo/Courtesy of the Xuanquanzhi Cultural Relics Management Office]

Another high-profile relic from the site is a letter Yuan wrote to his friend Zifang in the Han Dynasty. Written on silk in lishu (clerical script), the letter contains 319 characters in 10 lines, making it the earliest, most complete personal letter with the most words found in the country as of now.

In his letter, Yuan asked Zifang to do five things for him: buy a pair of shoes with leather vamp and silk insoles, purchase five quality writing brushes, call on a person called Ci Ru and ask him to write back to Yuan, make a seal for Lyv Zidu and buy a horsewhip for an officer surnamed Guo.

Historians surmised that Yuan’s letter was from somewhere less developed, and that Zifang was an official at Xuanquanzhi where there was a vibrant market nearby due to its position on the Silk Road.

Scholars remarked that compared with the grand narratives recorded in canonical historical texts, Yuan’s letter may pale into insignificance. However, it offers modern people an intimate glimpse into the lives of ordinary people living more than two millennia ago whose stories were rarely told.

Reviving the glory through tourism

Barely an hour’s drive away from the city of Dunhuang, the World Heritage site remains under the radar for most tourists beckoned by the appeal of the ancient city.

A part of the greater Dunhuang cultural tourism economic circle, which centers on Dunhuang, known for its world-renowned Mogao Grottoes, the Site of Xuanquanzhi is being built into a tourist destination with improved accessibility and comprehensive tourist services.

The construction of a tourist service center, a Xuanquan market, and a cultural relic exhibition center, is afoot. The ancient post house site is expected to welcome its first batch of tourists next fall, according to Xu Jinping, project manager of Xuanquanzhi tourism development.

“We are building a replica of Xuanquanzhi to help tourists better understand the ancient post house. At the Xuanquan market, they can find food and beverages and also be able to shop for souvenirs,” Xu said.

Rong Hongmei, public education director at the Dunhuang Museum, speaks to a group of journalists at the Site of Xuanquanzhi in Dunhuang city, Northwest China’s Gansu province, on July 30, 2023. [Photo by Yang Xiaoyu/chinadaiy.com.cn]