What episode is the torture of Wei Zi by the old princess Zhu Huan?

Introduction to Princess Zhu Huan Part I, Episode 1 Episode 14

Ganlong had the idea of "traveling incognito" with Yongqi, Erkang and Ertai. When the swallow knew, she kept clamoring for it. At the same time, the queen sent a few little eunuchs, while the swallow was away, regardless of the resistance of Shu Fangzhai, forcibly sent Wei Zi to the Palace of Kunning. The Queen has always doubted the origin of Wei Zi, believing that there must be a conspiracy between Swallow and Wei Zi. Besides, Sister Rong has always held a grudge against Wei Zi, and she even tortured Wei Zi in private. Although Wei Zi was tortured, she still didn't reveal the true identity of the swallow to the Queen.

Swallow was shocked to hear that Wei Zi was taken away by the queen, and quickly took Yongqi and others to Kunning Palace to find the queen's VIP. Unexpectedly, the Queen said that Wei Zi had been sent back. In desperation, everyone decided that Yongqi, Erkang and Ertai would go to Kunning Palace at night to find out the truth.

That night, Er Kang and others found the scarred Wei Zi in the Palace of Kunning. Erkang was very upset, but he accepted everyone's advice and saved Wei Zi every other day. The swallow went to the bedroom early in the morning to plead for mercy. Qianlong was frightened by the queen's move and quickly went to Kunning Palace to question the queen. The queen didn't want to admit it, but Yong Qi and others finally persuaded Gan Long to save Wei Zi on the grounds of seeing Wei Zi's black face here with their own eyes, which also taught Rong Mammy a hard lesson.