From the time Zhao Changhe and his party fell into the encampment of the Secret Realm to their arrival at the so-called Holy Mountain, the journey took a little over a day.
They set off in the afternoon and rested in the carriage for the better part of the night, finally reaching their destination the next evening.
The couple's condition had not fully recovered, so they didn't rush the coachman. Instead, they took their time to heal and recuperate in the carriage, stopping to eat at various tribal settlements along the way.
Ultimately, after some rough estimation, the journey covered a distance of just over three hundred li.
From this, one could glimpse the sheer vastness of the Secret Realm. Assuming the encampment was at the edge and the Holy Mountain was near the center, the radius of the Secret Realm was also around three hundred li.