Which episode of Yan Ge Xing appeared in the new version of Princess Zhu Huan?

In the 3 1 episode of Swallow Flying in the Princess of Pearl, Jin Suo, four guards and four gifted scholars were secretly planned, even the imperial concubine and Benmingjie's master Lang Shining "obeyed", and Liu Qing and Liu Hong also entered the palace for the first time. On the birthday of Wei Zi's little swallow sisters, everyone presented a big "surprise" of combining Chinese and western. Everyone sang Swallow Song and Wei Zihua together.