Here is a great documentary that I recommend viewing if you have the time. It has a lot to teach regarding history in China. I personally find it very interesting. If you watch it, please do comment on what you have learnt from this fascinating documentary about Qi Jiguang and the longest structure in the world - The Great Wall of China.
"A two-hour drama documentary that illustrates a pivotal period in ancient Chinese history, which culminated in the creation of the Great Wall, a structure that symbolizes the strength and ambition of the Chinese nation and the relentless focus of the ruler and legendary general Qi Jiguang. Interweaving dramatisation and interviews with the world's foremost authorities on the Great Wall and the Ming Dynasty, the film unravels the epic story of the world's single greatest structure -- 3,000 miles of an impregnable fortress." - Description on YouTube
I was unable to insert the video so here is a link that will take you there. ENJOY!...