This great website is an interactive from the British Museum. You can explore via a theme or click on the globe at the bottom of the picture to take you to an A-Z list of topics. You find Ancient China at the top of the list!
Here you can explore a Chinese tomb, ancient Chinese crafts, silk and early writing.
The video and link below will give you an overview of the geography of China and how it affected the history of China.
Qin Shi Huangdi First Emperor of Qin Dynasty
Image from: Encyclopædia Britannica ImageQuest.
Take a look at this video from Awesome Stories.
There is a National Geographic show in 5 parts on Youtube. It is called Secrets of the First Emperor and the first part is here. You will be able to locate the others yourself.
The First Emperor of China and his life and accomplishments are the subject of this 8:25 min long video. A very good overview with many insights into the forces that moulded him.
These sites cover more than one dynasty.