Where does the new Princess Huanzhu go back to Xinrong to have children? Which episode is it?

In episode 98, Yongqi thinks that the task is half finished, and the child will be his hope for his mother. Ben Ming Jie woke up and drew a picture of a swallow sleeping in a bed. When Xinrong gave birth to her son, Yongqi said goodbye to the emperor. The emperor respected his choice and declared him dead if he didn't return for three years. Yongqi rode out of the palace alone with a newly written letter and a swallow bell when the child was full moon. Er Kang and Wei Zi, who are pregnant, saw each other off halfway. Swallow and Yongqi finally met again one day after the agreed deadline. Ben Ming Jie said goodbye to Xiao Jian and rode away.