One and Only

Composer

• 
  Tan Xuan

Costume Designer

• 
  Huang Wei

Director

• 
  Guo Hu

Producer

• 
  Gong Yu
• 
  Chen Xiao

Screenwriter

• 
  Mo Bao Fei Bao

Main Role

• 
  Ren Jia Lun

  Zhou Sheng Chen

  Main Role
• 
  Bai Lu

  Cui Shi Yi

  Main Role

Support Role

• 
  Wang Xing Yue

  Liu Zi Xing

  Support Role
• 
  Li Yi Ru

  Hong Xiao Yu [General]

  Support Role
• 
  Zhou Lu La

  Xiao Yan [2nd Prince of Nanxiao / Monk]

  Support Role
• 
  Ethan Yao

  Cui Feng [Cui Shi Yi's cousin]

  Support Role
• 
  Zhang Cheng Hang

  Zhou Tian Xing [General]

  Support Role
• 
  Yuan Ruo Hang

  Xie Yun [General / Xie Chong's son]

  Support Role
• 
  Su Meng Yun

  Feng Qiao [General]

  Support Role
• 
  Wu Man Si

  Qi Xing Hua [Princess]

  Support Role
• 
  Fu Jun

  Xie Chong [Military Advisor]

  Support Role
• 
  Liu Wei Wei

  Cui Wen Jun [Cui Shi Yi's mother]

  Support Role
• 
  Liang Ai Qi

  Qi Zhen Zhen [Empress Dowager]

  Support Role
• 
  Yu Yang

  Cui Guang [Grand tutor]

  Support Role
• 
  Jeremy Luo

  Liu Hui [Emperor]

  Support Role
• 
  Wang Xing Han

  Zhao Teng [Grand eunuch]

  Support Role
• 
  Guo Wei

  Liu Yuan [General-in-chief]

  Support Role
• 
  Guo Jun

  Liu Wei [Prime minister]

  Support Role
• 
  Wang Yu

  Liu Chang Shan [Court minister]

  Support Role
• 
  Zhang Zhang

  Cheng Xi [Cui Shi Yi's maid]

  Support Role
• 
  Han Cheng Yu

  Huan Yu [Teacher]

  Support Role
• 
  Chu Zhen

  Cui Shou [General]

  Support Role
• 
  Li Huai Long

  Cui Zheng

  Support Role
• 
  Geng Li Ming

  Cui Wen Ji

  Support Role
• 
  Wang Yi Lin

  Meng Luan [Liu Zi Xing's eunuch]

  Support Role
• 
  Daniel Feng

  King Ping Qin [Feudal king of Ping Qin town]

  Support Role
• 
  Dai Si

  Jin Zhen Er [Liu Hui's unfavored consort]

  Support Role
• 
  Pan Qi Yan

  Concubine Jiang [Liu Hui's beloved consort]

  Support Role
• 
  Xie Hong Xin

  Xie Chen [Xie Chong's godson]

  Support Role
• 
  Zheng Lu

  Zhangsun Jie [Zhou Tian Xing's subordinate]

  Support Role
• 
  Wang Hao Zhen

  Qin Yan [Hong Xiao Yu's subordinate]

  Support Role
• 
  Luo Er Yang

  Emperor Xiao [Southern Xiao]

  Support Role
• 
  Liu Bo Xiao

  Jin Rong [Hu general / Jin Zhen Er's father]

  Support Role
• 
  Li Yu Su

  Empress Gao

  Support Role
• 
  Xi Xue

  Gao Huai Yang

  Support Role
• 
  He Yi Chen

  Yang Shao [Former general of Yong City]

  Support Role
• 
  Huang Ji Dong

  Yuan Wu Chu [Deputy commander of Imperial guards]

  Support Role
• 
  Hu Cheng Yi

  General Gan

  Support Role
• 
  Xu Yi Wen

  "Lady Li" / Li Xian Ren [Liu Zi Xing's nanny]

  Support Role
• 
  Su Yu Chen

  Hou Mochen Yue

  Support Role
• 
  Li Ting Xu

  Liu Zi Zhen [Son of deceased Prince Tao Lin]

  Support Role
• 
  Chen Bao Guo

  Qin Bin [Empress Gao's henchman]

  Support Role
• 
  Zhang Hai Feng

  [Military physician]

  Support Role
• 
  Ren Xi Hong

  [Court minister]

  Support Role
• 
  Zhang Bin

  [Imperial physician]

  Support Role

Guest Role

• 
  Luo Lei

  [Cui Shi Yi's father]

  Guest Role
• 
  Li Chao Ping

  Emperor Liu Hui [Young]

  Guest Role
• 
  Liu Qi Qi

  Cui Shi Yi [Young]

  Guest Role
• 
  Oscar He

  Zhou Sheng Chen [Young]

  Guest Role
• 
  Zhang Shun Han

  Liu Zi Xing [Liu Hui's study companion]

  Guest Role
• 
  Zhou Yan

  [Zhongli Temple abbot] (Ep 4)

  Guest Role
• 
  Yu Qing

  [Boatman of Daliang]

  Guest Role
• 
  Feng Li Ping Guest Role
• 
  Hao Zhen Jun

  Song Qian

  Guest Role

Voice Actor

• 
  Bian Jiang

  Zhou Sheng Chen

  Voice Actor
• 
  He Wen Xiao

  Hong Xiao Yu

  Voice Actor
• 
  Liu Qing

  Cui Shi Yi

  Voice Actor
• 
  Jin Li

  Meng Luan

  Voice Actor
• 
  Li Lan Ling

  Xie Chen

  Voice Actor
• 
  Xu Chang Fan

  Gao Huai Yang

  Voice Actor
• 
  Shen Liang Jun

  Zhou Sheng Chen [Young] | Shu Tong

  Voice Actor

Unknown

• 
  Li Jin Li Unknown