China developed along major rivers like the Yellow River and Yangtze River. Chinese culture began around 1500 BC and was governed by dynastic rulers who held a "Mandate of Heaven". Confucianism and Taoism were influential philosophies that emphasized order, harmony with nature, and respect for elders. The Great Wall was constructed to protect against northern invaders. Contributions included paper, porcelain, silk, and the Silk Road which facilitated trade. Confucius advocated for order through relationships and education while Laozi sought harmony with nature's way or Tao. Yin and yang represented balancing opposing forces.