Bai Qian, being the God Emperor of the Monster Path, her carriage wasn't simply just for pomp and show when she travelled.
Originally carved from an extremely rare natural spirit treasure, it was further refined by the top Artefact Refiners from the Upper Three Realms that were handsomely paid by the Eight Heavens themselves, aiming for it to be fully functional as long as enough Spirit Crystals were stuffed into the treasure's nucleus, without needing a driver.
As long as there were enough Spirit Crystals, dozens of 15th Realm Immortal Kings could not breach this carriage's defenses.
Not only that.
Unique boundaries were imprinted on the carriage.
Although the carriage itself had an open design with no roof and openings on all sides, under the effect of these imprinted boundaries, unless the adversary knew how to crack the boundaries, no one could see or hear anything that was happening inside.