thumb|Stone sickle, Peiligang culture (7000–5000 BC)Yellow River civilization, Huanghe civilization or Huanghe Valley civilization, Hwan‐huou civilization is an ancient Chinese civilization that prospered in the middle and lower basin of the Yellow River. Agriculture was started in the flood plain of the Yellow River, and before long, through flood control and the irrigation of the Yellow River, cities were developed and political power found reinforcement. One of the "four major civilizations of the ancient world", it is often included in textbooks of East Asian history, but the idea of including only the Yellow River civilization as one of the four biggest ancient civilizations has become outdated as a result of the discovery of other early cultures in China, such as the Yangtze and Liao civilizations. The area saw the Yangshao and Longshan cultures of the Neolithic era and developed into the bronze ware culture of the Shang and Zhou dynasties.