Good Bye My Princess
- Title: 东宫 / Dong Gong
- English Title: Goodbye My Princess
- Also known as: Eastern Palace
- Genre: Historical, romance
- Episodes: 52
- Broadcast network: Youku
- Broadcast period: 2019-Feb-14 to 2019-Mar-25
- Air time: 20:00
- Original soundtrack: Good Bye My Princess OST
Heart-wrenching love between the 5th prince of Li Dynasty and the 9th princess of the Western State.
- Chen Xing Xu as Li Chengyin / Gu Xiaowu
- Fifth prince (Prince Yi) of Li kingdom; later Crown Prince.
- Peng Xiao Ran as Xiaofeng
- Princess of Western State.
- Wei Qian Xiang as Gu Jian
- The last descendant of the Gu lineage. Li Chengyin's cousin, Xiaofeng's teacher.
- Li kingdom Royal Family
- Siqin Gao Wa as Grand Dowager Empress
- Gallen Lo as Emperor
- Zhang Ding Han as Zhang Meiniang, Empress of Li kingdom. Niece of Gao Yuming.
- Gao Yi Han as Gao Ruyi, Royal Consort Gao. Daughter of Gao Yuming.
- Wang Jia Qi as Gu Yuyao, Li Chengyin's birth mother.
- Zhang Tong as Wei Xiuyi, Li Chengmei's birth mother.
- Dong Xian as Consort De
- Zhang Ao Yue as Li Chengji, Crown prince
- Kingone Wang as Li Chengye, Second prince (Prince Xuande)
- Yang Tong as Li Chengmei, Third prince (Prince Rong)
- Jin Xuan Yu as Li Chengyuan, Fourth prince (Prince Yun)
- Cheng Xiao Meng as Yong Ning, Seventh princess
- Chen Jin Ru as Luo Xi, Eighth princess. Pei Zhao's betrothed wife.
- Xia Wa as Zhao Sese, Li Chengyin's side consort
- Yao An Lian as Prince Zhong, brother of the Emperor
- Ministers and generals
- Wang Zhi Fei as Gao Yuming, Prime Minister
- Fan Lin Feng as Li Yan, son of Prince Zhong. Loyal subordinate of Li Chengye.
- Wang Guan as Pei Zhao, Commander of Yulin Army. Loyal subordinate of Li Chengyin. Luo Xi's husband.
- Lu Xing as Gao Xian, first son of Gao Yuming. Dingyuan general.
- Yu Bin as Gao Kun, second son of Gao Yuming. Minister of Revenue.
- Feng Xiao Tong as Gao Zhen, third son of Gao Yuming. Assistant minister.
- Guo Tao as Zhao Jingyu, Duke of Zhenbei. Zhao Sese's father.
- Zhu Zan Jin as Zhao Shixuan, son of Zhao Jingyu. Assistant minister.
- Wang Han as Zeng Xian, Commander of Shen Wu army
- Li Jian Xin as Ye Cheng, Grand secretary
- Han Jing Huo as Zhang Can, Commander of the Left Yulin Army. Nephew of the Empress.
- Shen Bao Ping as Wang Shu, Officer of Dali Temple
- He Qiang as Zong Huan, Minister of Justice
- Cheng Guo Dong as Xi Qingzhuo, Minister of Rites
- Wang Huan as Gu Ruhui, former Minister of Li kingdom. Gu Jian's father.
- Fan Jin Lun as Yuan Tong, Gao Xian's subordinate
- Cui Li Ming as Grand Secretariat, Li Chengyin's former teacher
- Fan Shi De as Minister An
- Han Long Xuan as Li Shiqing, teacher of Li Chengyin
- Shen Xue Wei as Fang Shiqing, teacher of Li Chengyin
- Zhu Xin Fan as Physician Wang
- Wang Yue Yao as Leng Kun, Li Yan's subordinate. Replaces Ba Tu'er as scapegoat for the Crown Prince's murder.
- Jiang Chang Yi as Cao Jiu, Head eunuch. Personal attendant of the Emperor.
- Gao Yuan as Shi En, personal attendant of Li Chengyin
- Gu Jia as Yong Niang, personal attendant of Xiao Feng
- Yi Han as Xu Niang, a maid at the Crown Prince's residence. She became pregnant with Zhang Can's child.
- Wang Jia He as Ying Niang, personal attendant of the Empress Dowager
- Wang Tong Yu as Rong Shuang, personal attendant of the Empress
- Li Wen Long as Wei Shen, attendant of the Empress
- Guo Rui Xi as Jin'er, personal attendant of Zhao Sese
- Li Na as Ying'er, a maid sent by Empress to spy on Li Chengyin
- Shang Si Qi as Chan'er, attendant of Li Chengyin. She is actually working for Li Chengye.
- Zhou Xian Xin as Fang Shangyi, etiquette teacher
- People of Li Kingdom
- Shao Feng as Chai Mu, leader of Pugilistic organization Qian Long Order. He was previously known as Chen Zheng, an officer of Li kingdom who was falsely accused and evicted by Gao Yuming.
- Wei Xiao Han as Ming Yue, a courtesan at Ming Yu brothel. She was previously known as Chen Yan, daughter of Chen Zheng.
- Guan Le as Mi Luo, owner of Mi Luo Wine House. She likes Pei Zhao.
- Zhao Ren Jie as Hu Xiao, Chai Mu's subordinate
- Lu Ke Ke as Tao Jian, member of Qian Long Order
- Guo Jun Ke as Sun Er, an assassin under Li Chengyin
- Zhuang Qing Ning as Shiguo Furen, mother of the Empress
- Han Ying as Zhang Can's mother
- Xu Min as Mother Wang, mamasan of Ming Yu brothel
- Wei Yi Yi as Xiao Wei, shopkeeper of the cosmetics and clothing store
- Western State
- Jiang Kai as Qu Wencheng, King of Western State. Xiao Feng's father.
- Tian Ling as Ashina Yun, Queen of Western State. Xiao Feng's mother. Daughter of King Tomur.
- Yang Gong Ru as Princess Mingyuan, Princess of Li kingdom. She was married to Qu Wencheng through a political marriage.
- Hu Chun Yong as Qu Tianze, Prince of Western State
- Li Ming Hui as Dimo, Ashina Yun's subordinate
- Fang Shuai as Lahemeng, Officer of Western State
- Zhao Zhen Gang as Witch Doctor
- Dan Chi
- Zheng Xiao Ning as King Tömür, King of Dan Chi. Xiao Feng's grandfather.
- Zhang Ge as Yi Moyan, grandson of Tomur
- Zhang Heng Rui as He Shi, number one hero of Dan Chi. Ah Du's brother.
- Nagima as Ah Du, Xiao Feng's best friend and loyal servant
- Tian Xin Yu as Batu'er
- Shuo Bo
- Hao Wen Xue as King of Shuo Bo
- Zhao Long Hao as Prince Lidun, Prince of Shuo Buo. Nephew of the King.
- Chen Tao as Yuan Ge, general of Shuo Bo
- Lu Shao Ping as Du Yin
- Cai Jun as Qu Lun
- Huo Yi Feng as Fang Menggeng
- Li Fu Lv as Shen Yan
- Ming Xiao Xi as Lu Pingzhang
The series was filmed from August 21, 2017 (at Huairou) to February 2018. Filming also took place in Beijing, Bashang Grassland, Dunhuang and Hengdian.
- Original Writing: Dong Gong (东宫) by Fei Wo Si Cun
- Director: Li Mu Ge
- Screenwriters: Qian Yu (钱珏), Wang Yi Han (王乙涵), Xu Xiao Lin (徐晓霖), Hu Rong (胡蓉), Liu Xiao (刘笑), Ke Yi Tong (柯宜彤)
- Producer: Li Huan (李欢), Wang Bo Tong (王博童)
- Company: Talent Film & Television, Youku, HualuBaina Film & TV, HS Entertainment, Meinong Entertainment