The name of that music should be "The Fifth Pavilion Ebitian", or it could be "The Third Pavilion Yuu", and the warm music played by Erkang Ziwei and the others together is called "大団円". Or "Sleep on Kunlun's journey".

The music "キリン神上す" is often used when the emperor or the queen mother appears.

"あかね regain the offensive and defensive battle 2" is a very tense song in Huanzhu Gege.

There is also "The Third Pavilion ウー", which also appeared in Huanzhugege

You can find it by searching directly on Baidu

By the way , Qiong Yao's drama draws on a lot of Japanese music. Most of the background music for Returning the Pearl comes from the Japanese anime "Ranma 1_2 China's Kunlun Showdown". You can come down and listen to it when you have time.