Trailer for Dragon Blade.
In modern times, an American archaeology group bought a military manuscript from the Han Dynasty. The manuscript details how Roman soldiers went to China about 2,000 years ago and built a city called Regum. However, with limited evidence, the archaeology community thought it was a fake and so the archaeology group sent an expeditionary group to confirm their findings. In a four vehicle convoy, Christian (Vaness Wu) and his lady colleague (Karena Lam) split with the group to expand their search and it is the two that found and confirmed the existence of Regum. Covered in snow, the two thought it was a highly unusual city as it clearly built as a Roman city, but with Chinese aesthetics. Upon closer observation, there's a golden plaque written in both Latin and Chinese; towering over the city was the armor of General Hou. Curious on how the city looks like, the two activated their advanced satellite and laser imaging system to help them visualize and rebuild the city through a 3D virtual simulation. From there, the two got a chance to learn more about the history of how this city came to be.
Going back into the past, the year is now 48 BC, the Silk Road at China's western border. During the era of the Han Dynasty, the Silk Road experienced much turmoil due to the various tribes and nations that conflict over the Silk Road. Huo An (Jackie Chan), a Hun, serves as a commander of the Protection Squad of the Western Regions to the Han Emperor. They are tasked by the emperor to maintain stability between the warring 36 nations in the Silk Road region.