Time travel, rebirth, soul transformation, parallel worlds... The CP ways you want are all here.
World One: "Nirvana in Fire" King Qi Xiao Jingyu No cp
World 2: "The King of Lanling" Yu Wenyong CP Gao Changgong
World 3: "Flower Thousand Bones" Bai Zihua cp Shengxiaomo
World 4: "The Legend of Ancient Swords" [Su Zi] Baili Tu Su CP Zi Yin
World Five: "The Holy Saint of Confucianism and Taoism" [Fang Yan] Fang Yun CP Yan Yukong
World 6: "The Legend of Lu Xiaofeng" [Lu Chu] Lu Xiaofeng cp Chu Liuxiang
World Seven: "List of Heroes of the Gods" [Fa Ya] Ji Fa CP Jiang Ziya
World 8: "Detective Conan" [New Express] Kudo Shinichi CP Kuroba Kaito
World 9: "Sweet Honey as Ashes as Frost" [Emperor Water] Taiwei CP Luolin
World Ten: "Three Lives, Three Worlds and Ten Miles of Peach Blossom" [Dongzhe] Donghua CP Zheyan
World Eleven: "Do you know whether it should be green, fat, red and thin" [Yebai] Gu Tingye cp Sheng Changbai
World Twelve: Current Entertainment [Gakai] Wang Jiaer CP Wang Kai
World Thirteen: Parallel World [Double North] Sabeining CP He Jiong
World Fourteen: Rebirth [Nan Xue Beizhang] Da Zhangwei cp Xue Zhiqian
To be added, the order of writing is not necessarily certain, do not rise to the real person, please do not attack if you don't smoke, thank you
Purpose: Give the world one more possibility
[Crazy] Li Xiang Refuses to Become Bai Yueguang