The key lies in the era of the Great Ancestor and Emperor Taizong, during which the Great Ancestor and Emperor Taizong built a large number of straight roads in Jizhou and north of the Great Wall, to facilitate their campaigns against the Northern Yuan Dynasty.
This made their marches faster and more convenient, with many soldiers even able to take brief rests and recover their energy and spirits by riding ox carts.
Unfortunately, many of the Shenji Camp soldiers were not skilled horse riders. The great majority among them tied their legs on the horse and moved on, otherwise, their speed would have been faster.
Hovering over the torch and human-animal-filled 'expedited road' was Li Xuan, standing on a flying boat.
Xue Yunrou's 'Nine Heavens Ten Lands Pimo Divine Shuttle' had flown to the Capital City, but Heavenly Master Zhang Shenye had various flying artifacts at his disposal.
