Xu Kai (simplified Chinese: 许凯; traditional Chinese: 許凱; pinyin: Xǔ Kǎi, born 5 March 1995), also known by his nickname "Soso", is a Chinese actor and model. He is known for his roles in television series Story of Yanxi Palace , The Legends , Arsenal Military Academy: AMA , Falling Into Your Smile , Royal Feast , She and Her Perfect ...