The Promise of Chang’an 长安诺 (2020)
Also known as: 长安诺 / Cháng’ān nuò / คำสัตย์เมืองฉางอัน

Genres: Historical, Drama, Sheng Dynasty, Romance
Episodes: 56
Country: China Mainland
Director: Yin Tao
Writer: Liu Fang, Li Hui Min, Cheng Ting Yu, Cheng Yu (程妤), Pan Hui Cheng (潘荟程)
Network: Tencent Video
Release Date: Sep 10, 2020 – Nov 12, 2020
Related Show:

Cast:

• Zhao Ying Zi (Sarah Zhao) as Helan Mingyu (Lan Ming Yu)
• Cheng Yi as Xiao Cheng Xu [9th Prince]
• Zhou Ao Yun as Xiao Chengxu (young)
• Han Dong as Xiao Cheng Rui [Emperor]
• He Zhong Hua as Xiao Cheng Li [2nd Prince]
• Liang Jing Xian as Ling Xiao’er
• Han Cheng Yu as Xiao Qiyuan
• Kang Jia Ze as Xiao Qiyuan (young)
• Liao Zhen Hao as Xiao Qiyuan (5-year-old)
• Wu Jing Jing as Helan Yunqi
• Liu Meng Meng as Helan Guanyin
• Zhao Wen Hao as Xiao Chengxuan
• Wang Jin Song as Xiao Shangyuan
• Wang Lin as Imperial Consort Lin
• Yang Chao Yue as Dong Ruoxuan
• Lu Chen Yue as Dong Ruoxuan (young)
• Zhang Rui as Helan Keyong
• Huang You Ming as Situ Gun
• Lu Xing Yu as Dong Yizhi
• Zhao Dong Ze as Xiao Qiyuan
• Zhang Mo Xi as Imperial Consort Qiaohui
• Fu Fang Jun as Xin Chengyao
• Huang Yi as Su Yuying
• Li Ze as Xiao Chengtai

Synopsis:
The story is set in the fictive Sheng country. He Lan Ming Yu is an honest and bright young lady. In her young years, she gets to know the 9th Prince Xiao Cheng Xu by chance. The two get along well and gradually develop feelings for each other. However, fate turns against them and while fake news that Cheng Xu died on the battlefield spread, Ming Yu is forced to marry Cheng Xu’s third older brother and reigning king Xiao Cheng Rui . Cheng Xu helps Cheng Rui establish a great and stable country through continuous big achievements on the battlefield, but Cheng Rui is filled with jealousy towards his outstanding younger brother.

When the truth about the death of Cheng Xu’s mother comes to light, Cheng Xu is determined to usurp the throne to take revenge. But before Cheng Xu succeeds, Cheng Rui dies from an old illness after ordering his son Xiao Qi Yuan to succeed the throne. Cheng Xu is forced to assist Qi Yuan while he grows up, and tries to revive his relationship with Ming Yu at the same time. Qi Yuan, however, is dissatisfied with Cheng Xu controlling him. When he finds out that his uncle has an affair with his mother, his hate towards Cheng Xu grows immensely. Ming Yu tries her best to reconcile her son with Cheng Xu. Source: cdramabase