The rope tied around her wrists wasn't that tight and secured. It was merely wounded around her wrists, and knots were made to lock it in. That is why Lin Xiaofei could break away from the rope without anyone's help.
"I already arranged and sent a letter to the general of the Zheng Empire sent to battle with the Chu empire's army," Erkin sipped from his teacup before continuing, "But why are you interested in this war? Why are you helping the Zheng Empire?"
The letter he sent to the army of the Zheng Empire was his promise to aid them with weapons. Although the Zheng Empire already had their own weapons at the ready, they were too far away from their city and near the borders of the Chu Empire.
Hence, when the war breaks out, even with a powerful and several soldiers in their army, the Zheng Empire might lose in the middle of war if they don't have enough weapons to use and change their old and broken ones.