In which episode did Qingying change her name to Ruyi?

It is reported that Qingying changed her name to Ruyi in the fourth episode of the TV series "Ruyi's Royal Love in the Palace".

In the play, Qingying persuades the emperor to open his heart and obey the queen mother as filial piety. In the end, the emperor was persuaded by Qingying and decided to let the queen mother rest in peace. When the queen mother was happy, he interceded for Qingying and let her enter the palace. The emperor took the Queen Mother to visit Cining Palace, and the Queen Mother was very satisfied. The Queen Mother reminded the Emperor to reuse veterans, and the Emperor agreed and promised to improve the Queen Mother's family ties. In addition, the Emperor also said that he would add the Queen Mother's emblem and name it Chongqing.

The Queen Mother heard that Qingying had tried every means to advise her and found Qingying. The Queen Mother ordered Qingying to be exempted from the grounding and allowed her to return to the palace. Qingying begged Taihu to give her a new name so that she could cut off her old past and pray for new blessings. The Queen Mother asked Qingying what she longed for most, and Qingying replied: "The love is profound and the two hearts are committed to each other."

The Queen Mother gave Qingying the name Ruyi, and "Yi" means beautiful and quiet. , and the perfect beauty in the world is so rare, it would be great if you can be like Ruyi. Qingying was very grateful to the Queen Mother for her teachings.