In which episode did Jin Yuyan say that you are the emperor’s first child after he ascended the throne?

Episode 28. In the 28th episode of "Ruyi's Royal Love in the Palace", Jin Yuyan, the concubine of the imperial family, gave birth to the first noble son since Qianlong ascended the throne, who later became the fourth elder brother. The arrival of the fourth elder brother also made the ambition of the concubine of the imperial family grow bigger and bigger. At that time, Mei Guiren and Yi Bi were pregnant before Jin Yuyan. Jin Yuyan was cruel and sent someone to put drugs in their food and put the blame on Ruyi. Later, Mei Guiren gave birth to a freak and was executed. The child was an S fetus and was not born.