Because his father was a governor, Tang Jiakai was very smart, but he wasn't mature enough yet.
Anyway, he was talented, so as long as he learned more about politics, he could reach an important position with his family's help.
It was impossible for him to do that on his own, because without connections, he probably wouldn't make great achievements in his career.
Master Tang used to be a businessman, but he had close old friends in politics, so Tang Yunhang also relied on his father's connections to get to his current position. Otherwise, no matter how outstanding Tang Yunhang was, he wouldn't have been promoted to his current position.
Even if he did his best, he would have only reached a position which was less important than his current position. In addition, he still needed the Tang family's help.
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