The Longest Day in Chang'an

The Longest Day in Chang'an
Promotional poster
Traditional Chinese長安十二時辰
Simplified Chinese长安十二时辰
Hanyu PinyinCháng'ān Shī'èr Shíchén
GenreHistorical drama
Mystery
Based onThe Longest Day in Chang'an by Ma Boyong
Written byPaw Studio
Directed byCao Dun
StarringLei Jiayin
Jackson Yee
Country of originChina
Original languageMandarin
No. of seasons1
No. of episodes48
Production
Executive producerLiang Chao
Production locationsXiangshan Film and Television Town, Xiangyang, Hubei
Production companiesYouku
Beijing Weying Technology Co., Ltd
Liu Bai Entertainment
Yuyue Film Co., Ltd
Original release
NetworkYouku
ReleaseJune 27 (2019-06-27) 
August 12, 2019 (2019-08-12)

The Longest Day in Chang'an (Chinese: 长安十二时辰) is a 2019 Chinese historical suspense drama directed by Cao Dun and written by Paw Studio. The series stars Lei Jiayin and Jackson Yee. It is based on the novel of the same name by Ma Boyong. The Longest Day in Chang'an is produced jointly by Youku, Beijing Weying Technology Co., Ltd, Liu Bai Entertainment and Yuyue Film Co., Ltd. The series follows the characters Zhang Xiaojing and Li Bi, and their efforts to foil a terrorist attack on Chang'an, the capital of the Tang dynasty (618907). It began airing in China on Youku from June 27, 2019.