I want to know the answer to the following question:
Which Basin did the Han lose authority of?
All the background I'm provided with is that "During the turbulent reign of Wang Mang, Han lost control over the Tarim Basin, which was conquered by the Northern Xiongnu in AD 63 and used as a base to invade Han's Hexi Corridor in Gansu.". Is that enough to answer the question?
Answer: yes