《辽史·列传·卷三十三》
道路甚远，又多险阻，动辄积年累月；等到到达屯所，费用已用去过半；一头牛一驾车，只见人去，很少有回来的。
道路修阻，动淹岁月；比至屯所，费已过半；只牛单毂，鲜有还者。
The roads are very long and there are many obstacles. It often takes years and months to travel; by the time you reach the garrison, more than half of the expenses have been used up; for an ox and a cart, you only see people leaving and it is very rare for them to return.