Tianxia Diyi watch online

The Royal Swordsmen (天下第一; literally Number One Under Heaven) is a 2005 wuxia television series directed by Deng Yancheng and Wei Liyuan. A mainland Chinese, Taiwanese and Hong Kong co-production, it starred an ensemble cast from all three regions including Roger Kwok, Li Yapeng, Wallace Huo, Michelle Ye, Damian Lau, Tammy Chen, Gao Yuanyuan, and Eva Huang. Set in 17th-century China during the Ming dynasty, it follows four martial artists who are recruited to serve as elite secret service agents dedicated to protecting the emperor. It was first shown on Shenzhen Media Group's Drama Channel on 30 January 2005.

Source: Wikipedia (CC BY-SA)