Apoor farmer's son grows up to be one of the most politically powerful government officials in china. which important tang and song cultural feature allowed this person to become so successful?

The Tang and Song dynasty are firm believers of Confucianism and thus had their exams based on the teachings of Confucius. Many Chinese became successful leaders because of their firm belief in Confucianism. Courts would often use an exam system for people to take position in government.