Let me do the math for you.
All the toll stations to pass are Houma, Yicheng, Qinshui and Changzhi.
If you go from Gaoping, count the eldest son Xiaozhaozhuang, a ***8 in Changzhi County, Gaoping.
If you start from Changzhi County, you can count eight Changzhi 1 * * * in Changzhi County, Gaoping, Zhaozhuang.
If you go from the eldest son, count the eldest son Gao Ping Changzhi ***7.
If you start from Gaoping, count Xiaozhaozhuang, Gaoping and Changzhi.