I want to know the answer to the following question:
Where did Hou Xian and Zhi Guang travel through on their way to the Karmapa?
All the background I'm provided with is that "In order to seek out the Karmapa, the Yongle Emperor dispatched his eunuch Hou Xian and the Buddhist monk Zhi Guang (d. 1435) to Tibet.". Is that enough to answer the question?