In which episode of Zhen Huan's biography did the emperor invite Nian Gengyao to dinner?

The twentieth episode. In the twentieth episode of TV series "Hougong Empress", Nian Gengyao pacified Xi Huang, returned to China to pay his respects, and Yong Zhengdi held a celebration banquet for Nian Gengyao. At the celebration dinner, he thought he was a hero of the imperial court, and he was even more unscrupulous in front of the emperor. He even ignored the emperor and even asked Su Peisheng to pour himself wine. "The Queen of the Palace" is a clean-packed drama produced by Beijing Television Art Center 20 1 1, directed by Zheng Xiaolong, written by Wu (acted the role of) and Wang Xiaoping, starring Sun Li and Chen Jianbin.