Context: The rulers of the expansionist Qin dynasty, based in present-day Gansu and Shaanxi, were only the first strategists to realize that the area's military importance matched its commercial and agricultural significance. The Sichuan basin is surrounded by the Himalayas to the west, the Qin Mountains to the north, and mountainous areas of Yunnan to the south. Since the Yangtze flows through the basin and then through the perilous Yangzi Gorges to eastern and southern China, Sichuan was a staging area for amphibious military forces and a refuge for political refugees.[citation needed]

Question: What surrounds the Sichuan basin to the west?
Answer: the Himalayas

Question: What mountains surround the Sichuan basin to the North?
Answer: Qin Mountains

Question: What river flows through the Sichuan basin?
Answer: Yangtze

Question: Where was the Qin dynasty based?
Answer: present-day Gansu and Shaanxi

Question: What surrounds the Sichuan basin to the South?
Answer: mountainous areas of Yunnan

Question: What mountain range surrounds the entire Sichuan Basin?
Answer: Unanswerable

Question: What dynasty was based in the Himalayas?
Answer: Unanswerable

Question: What river flows south of the Sichuan basin?
Answer: Unanswerable

Question: What mountain range was a staging area for military forces?
Answer: Unanswerable

Question: What surrounds the Sichuan basin to the east?
Answer: Unanswerable

Question: What mountains surround the China basin to the North?
Answer: Unanswerable

Question: What river flows through the China basin?
Answer: Unanswerable

Question: Where was the Yangtze dynasty based?
Answer: Unanswerable

Question: What surrounds the China basin to the South?
Answer: Unanswerable