were trades prominent then?
Yes, the Silk Road from China to Europe and the Western World was reopened by the Tang and remained open for almost four decades.
Tang dynasty
Although the Silk Road from China to Europe and the Western World was initially formulated during the reign of Emperor Wu (141–87 ) during the Han, it was reopened by the Tang in 639 when Hou Junji ( 643) conquered the West, and remained open for almost four decades. 
what did tang leaders do to help rule this large empire Raised professional and conscripted armies of hundreds of thousands of troops to contend with nomadic powers; indirectly controlled several regions through a protectorate system. when was this dynasty period? 618 to 907 AD which dynasty preceded it? Sui dynasty who is the leader ? Li Yuan, known as Emperor Gaozu of Tang what led way to the emergence of this dynasty? UNANSWERABLE who founded the latter dynasty? Emperor Wen of Sui what can you tell me about its culture? Major public works like the Great Wall and the Great Canal were initiated; the political system developed by Sui; religion and literature, particular examples being Buddhism and poetry. how is this dynasty associated with confucianism? Confucian philosopher Wang Tong wrote and taught during the Sui Dynasty. what was the position of women in the former dynasty? Concepts of women's social rights and social status during the Tang era were notably liberal-minded - however, this was mostly for urban women of elite status; women in the rural countryside labored hard in their different set of tasks. what was the role of literature during this period? The Tang period was a golden age of Chinese literature and art - "gushi" and "jintishi" were popular poetry styles.
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Tang dynasty [SEP] Silk Road
When the An Lushan Rebellion ended in 763, the Tang Empire withdrew its troops from its western lands, allowing the Tibetan Empire to largely cut off China's direct access to the Silk Road. An internal rebellion in 848 ousted the Tibetan rulers, and Tang China regained its northwestern prefectures from Tibet in 851. These lands contained crucial grazing areas and pastures for raising horses that the Tang dynasty desperately needed. Despite the many expatriate European travelers coming into China to live and trade, many travelers, mainly religious monks and missionaries, recorded China's stringent immigrant laws . As the monk Xuanzang and many other monk travelers attested to, there were many Chinese government checkpoints along the Silk Road that examined travel permits into the Tang Empire.