- Country: China
- Genres: Action, Comedy, Romance
- Release:
- Director: N/A
- Writers: N/A
- Language: Mandarin
- Stars: Wallace Huo , Tammy Chen , Dicky Cheung Wai-Kin , Gao Yuanyuan , Eva Huang , Roger Kwok , Damian Lau , Li Yapeng , Kent Tong , Michelle Ye
- Runtime: 45 min
- Awards: 1 nomination
- AKA: The Royal Swordsmen , Tian xia di yi , The Royal Swordsmen (China) , Thiên Hạ Đệ Nhất Kiếm (Vietnam)
- Plot: The series is set in China during the Ming dynasty. Zhu Wushi, the uncle of the reigning Emperor, has been ordered by the previous emperor to establish a secret service called "Dragon Defending Mountain Manor" to protect the monarchy. Zhu, who is nicknamed "Tiedan Shenhou" has four elite secret agents serving under him. They are known by their codenames: "Heaven Number One", "Earth Number One", "Mysterious Number One", and "Yellow Number One". The Dragon Defending Mountain Manor has an ongoing rivalry with the Eastern Depot, another government spy agency led by the eunuch Cao Zhengchun. The Emperor knows that Zhu Wushi and Cao Zhengchun are equally influential in court politics and has been trying to use both of them to balance against each other. The four agents have to assist Zhu Wushi in curbing Cao Zhengchun's power, preserve the secret service's position in the imperial court, and defend the Emperor from internal and external threats.
- IMDB:tt0480500
Tian xia di yi Cast · · · ALL
Li Yapeng
段天涯
Wallace Huo
归海一刀
Michelle Ye
上官海棠
Roger Kwok
成是非
Gao Yuanyuan
柳生飘絮
Eva Huang
柳生雪姬
Dicky Cheung Wai-Kin
古三通
Damian Lau
朱无视
Kent Tong
万三千
Monica Chan
素心
Li Jianyi
曹正淳
Chao Deng
正德皇帝
Yasuaki Kurata
柳生但马守
Tang Qun
太后
Adam Chen
小林正
Lu Yong
乌丸