Final answer:
The golden age of the Qing Dynasty under Emperor Qianlong was a prosperous period marked by territorial expansion, controlled trade, and literary achievements.
Step-by-step explanation:
The golden age of the Qing Dynasty under Emperor Qianlong was a prosperous period from 1735 to 1796. During this time, the Qing Dynasty expanded its territory and population, controlled external trade with new rules, and achieved significant literary achievements. Emperor Qianlong, who ruled for over sixty years, embraced Confucian values and was a patron of scholarship and the arts.