Great Confucian of Early Tang

After the Shang Dynasty, there was no one to be king! Why did the Zhou Dynasty call themselves the Son of Heaven? Were there immortals in ancient times, and what did they look like? Qin Shi Huang burned books and buried scholars! Who was killed? And how much historical truth was buried?The Overlord Xiang Yu, eight thousand against one hundred thousand,Zhao Zilong's seven entries and exits at Changbanpo,Why are later generals not as good as the previous ones?The Hundred Schools of Thought, what did they pass on?