What is the ending of Princess Zhu Huan? Is it the same as the old one?

This is different. The ending of the old version of Zhu Huan 3 is that Xiao Jian, Sunny, May and Swallow live happily in Dali and have children. Their emperor Amal visited them in go to dali in his later years. As for Wei Zi and Er Kang, they still live in Beijing. Moreover, I remember that the children of Zhihua and Wu Ge were born long ago, instead of leaving the swallow in Dali for so long after the last child was born in the new version.

Also, in the old version, Swallow is a wife and Wuming is marrying a wife. The painting was later forced into marriage until May, but the new version seems not. Maybe Ming's wife is not a swallow.