1, South Vietnam's overseas trade is closely related to political and economic factors in Qin and Han Dynasties. First of all, politically, Nanyue State was founded by Zhao Tuo, the captain of Nanhai County, about 304 years ago after the demise of Qin Dynasty, and its territory was basically the hometown of Nanhai County in Qin Dynasty. Therefore, South Vietnam's overseas trade activities were influenced by the political system and policies of the Qin Dynasty to some extent.

2. Economically, Nanyue is located in the hinterland of the Pearl River Delta, where three rivers, north, west and south, meet in the abdomen, and the South China Sea is in the east, with a coastline of over 1000 kilometers. Such geographical conditions facilitate South Vietnam's overseas trade. In addition, Nanyue is rich in resources, including gold, silver, copper and iron.

3. The support of Qin and Han Dynasties to South Vietnam is also an important factor to promote its overseas trade development. For example, during the reign of Emperor Wu of the Han Dynasty, he sent envoys to Annan (now Vietnam) to promote the culture and technology of the Han Dynasty. These measures help to strengthen the ties between the Han Dynasty and Nanyue State and promote the economic and cultural exchanges between the two sides.

Related knowledge of South Vietnam

1, Nanyue State was a political power established in Lingnan area after the demise of the Qin Dynasty. Its founder is Zhao Tuo, known as the "Emperor of South Vietnam" in history. Zhao Tuo was a member of the Longchuan Knights of the South China Sea in Qin Dynasty. At the end of Qin Dynasty, Nanyue State was established in the local area, taking advantage of the chaos in the world. Zhao Tuo established himself as the military king of South Vietnam, with Panyu as its capital, and established the regime of South Vietnam.

2. The territory of South Vietnam is roughly equivalent to Guangdong, Guangxi, Hainan and parts of Vietnam, Hunan, Henan, Jiangsu. The political system of South Vietnam is to imitate the county system of the Qin Dynasty, while some places still retain the primitive tribal system. South Vietnam's economy is dominated by agriculture, fisheries and handicrafts, among which rice planting and silk manufacturing are the most developed.

3. After the establishment of the Han Dynasty, Zhao Tuo began to submit to the Han Dynasty, and in the period of Emperor Wu of the Han Dynasty, he was knighted by the Han Dynasty. Since then, the political, economic and cultural exchanges between Nanyue State and Han Dynasty have lasted for hundreds of years. Therefore, influenced by the Han Dynasty, South Vietnamese culture became an important part of Lingnan culture.