There was already a trading wagon waiting for them outside the inn.
That trading wagon should be prepared by the Blood God Cult so as not to arouse suspicion.
If any unknown carriages approached the Imperial Palace, they would definitely attract suspicion, but it would be different if it was the trading wagon.
In fact, there were several trading wagons entering and leaving the Imperial Palace every day to deliver goods, such as spiritual food ingredients, spiritual fruits, wine, tea, cultivation pills, spirit treasures, precious elixirs, and so on.
The Blood God Cult clearly planned to exploit this loophole to sneak Tang Li Xue into the Imperial Palace, then it would be her turn to lure the Second Prince out of the Imperial Palace.
After Tang Li Xue and Xi'er followed Mo Rui and the Blood God Cult's people out of the inn, all of them rode the trading wagon, then trading wagon was heading straight to the Imperial Palace.