subject: Exploration, foreign trade, war and diplomacy [print this page] Exploration, foreign trade, war and diplomacy
Starting in 139 BCE, the Han diplomat Zhang Qian traveled west in an unsuccessful attempt to secure an alliance with the Da Yuezhi (who were evicted from Gansu by the Xiongnu in 177 BCE); however, Zhang's travels revealed entire countries which the Chinese were unaware of, the remnants of the conquests of Alexander the Great (r. 336323 BCE). When Zhang returned to China in 125 BCE, he reported on his visits to Dayuan (Fergana), Kangju (Sogdiana), and Daxia (Bactria, formerly the Greco-Bactrian Kingdom which was subjugated by the Da Yuezhi). Zhang described Dayuan and Daxia as agricultural and urban countries like China, and although he did not venture there, described Shendu (the Indus River valley of Northwestern India) and Anxi (Arsacid territories) further west. Envoys sent to these states returned with foreign delegations and lucrative trade caravans; yet even before this, Zhang noted that these countries were importing Chinese silk. After interrogating merchants, Zhang also discovered a southwestern trade route leading through Burma and on to India. The earliest known Roman glassware found in China (but manufactured in the Roman Empire) is a glass bowl found in a Guangzhou tomb dating to the early 1st century BCE and perhaps came from a maritime route passing through the South China Sea. Likewise, imported Chinese silk attire became popular in the Roman Empire by the time of Julius Caesar (10044 BCE).
After the heqin agreement broke down, the Xiongnu were forced to extract more crafts and agricultural foodstuffs from the subjugated Tarim Basin urban centers. From 11560 BCE the Han and Xiongnu battled for control and influence over these states, with the Han gaining, from 108101 BCE tributary submission of Loulan, Turpan, Bgr, Dayuan (Fergana), and Kangju (Sogdiana). The farthest-reaching and most expensive invasion was Li Guangli's four-year campaign against Fergana in the Syr Darya and Amu Darya valleys (modern Uzbekistan and Kyrgyzstan). Historian Laszlo Torday (1997) asserts that Fergana threatened to cut off Han's access to the Silk Road, yet historian Sima Qian (d. 86 BCE) downplayed this threat by asserting that Li's mission was really a means to punish Dayuan for not providing tribute of prized Central Asian stallions.
To the south, Emperor Wu assisted King Zhao Mo in fending off an attack by Minyue (in modern Fujian) in 135 BCE.[118] After a pro-Han faction was overthrown at the court of Nanyue, Han naval forces conquered Nanyue in 111 BCE, bringing areas of modern Guangdong, Guangxi, Hainan Island, and northern Vietnam under Han control. Emperor Wu also launched an invasion into the Dian Kingdom of Yunnan in 109 BCE, subjugating its king as a tributary vassal, while later Dian rebellions in 86 BCE and 83 BCE, 14 CE (during Wang Mang's rule), and 4245 CE were quelled by Han forces. Wu sent an expedition into what is now North Korea in 128 BCE, but this was abandoned two years later. In 108 BCE, another expedition established four commanderies there, only two of which (i.e. Xuantu Commandery and Lelang Commandery) remained after 82 BCE. Although there was some violent resistance in 108 BCE and irregular raids by Goguryeo and Buyeo afterwards, Chinese settlers conducted peaceful trade relations with native Koreans who lived largely independent of (but were culturally influenced by) the sparse Han settlements.
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