Context: Throughout its prehistory and early history, the region and its vicinity in the Yangtze region was the cradle of unique local civilizations which can be dated back to at least the 15th century BC and coinciding with the later years of the Shang and Zhou dynasties in North China. Sichuan was referred to in ancient Chinese sources as Ba-Shu (巴蜀), an abbreviation of the kingdoms of Ba and Shu which existed within the Sichuan Basin. Ba included Chongqing and the land in eastern Sichuan along the Yangtze and some tributary streams, while Shu included today's Chengdu, its surrounding plain and adjacent territories in western Sichuan.

Question: What was Sichuan referred to as by ancient Chinese sources?
Answer: Ba-Shu

Question: How far back can civilizations in the Yangtze region be dated?
Answer: at least the 15th century BC

Question: Where were the kingdoms of Ba and Shu located?
Answer: within the Sichuan Basin

Question: What land was included in the kingdom of Ba?
Answer: Chongqing and the land in eastern Sichuan along the Yangtze and some tributary streams

Question: What land was included in the kingdom of Shu?
Answer: Chengdu, its surrounding plain and adjacent territories in western Sichuan

Question: What dates bsck to the 1500's BC on the Yangtze region?
Answer: Unanswerable

Question: What dates to the early Shang and Zhou dynasties?
Answer: Unanswerable

Question: What dynasties ruled in the Central China Yangtze region?
Answer: Unanswerable

Question: What was Ba-Shu referred to in ancient Chinese?
Answer: Unanswerable

Question: What was the Zhou dynasty referred to as by Chinese sources?
Answer: Unanswerable

Question: How far back can civilizations in the Changdu region be dated?
Answer: Unanswerable

Question: Where were the kingdoms of Shang and Zhou located?
Answer: Unanswerable

Question: What ancient Chinese history was included in the kindgom of Shu?
Answer: Unanswerable

Question: What ancient Chinese history was included in the kingdom of Ba?
Answer: Unanswerable