Why could poets of the Tang Dynasty travel frequently?

Wang Yuanbao, a businessman of the Tang Dynasty, was so rich that he could rival a country. He was favored by Emperor Xuanzong of Tang, who called him 'rich enough to rival the nobles'. He befriended the powerful and cleared the snow to welcome guests. After Huang Chao's defeat, Wang Jiu Hu helped repair the Zhuque Gate and Anguo Temple. Dou Yichang was good at dancing, Luo Hui focused on running the 'manure business', and became very wealthy. In the late Tang Dynasty, Yang Yi and Er prospered more than Chang'an and Luoyang. The children of the Jianghuai gentry transformed into businessmen. The young men of Wuling were wild and unruly. Wei Yingwu entered the officialdom with the shade of his family, and was a typical prodigal. After the Anshi Rebellion, he was determined to study and took the right path. The evil young men of the market challenged the two realms of yin and yang, with tattoos of Bai Juyi and Luo Yin's poems, or the image of the Green Pi Shaman King. Their names were attached to the Shence Army (the Forbidden Army), and they were arrogant in the market with their identity. The poets of the Tang Dynasty, walking between heaven and earth, 'wrote thousands of miles into their hearts'. And the rich and bumpy experience is the foundation of 'who in the world does not know you'. 1. Traveling and taking exams increased the poet's experience. 2. The selection system for official positions, examining body language and judgment 3. Seeking promotion. Seeking the recommendation of local officials (Li Bai) 4. Entering the curtain as a springboard (Han Yu, Li Shangyin, going north to Heshuo) 5. Non-institutional demotion, refuge from war, 6. Visiting travel