The problem may be due to a break in the network connection or other network faults. You can try to solve the problem by the following methods:
1) Press the pause button and wait for some time in order to ensure the download is complete. Then click the 'Play' button to try again.
2) Refesh the current web page after the clearing cathe by clicking the Toolkit on the top of Internet Browser -> Internet Option -> Delete File -> Delete All Off-line Contents -> OK.
Badaling Great Wall is located at the north entrance of the Guangou Ancient Road in Yanqing County, Beijing. It is the most well preserved section of the Great Wall, built druing the Ming Dynasty. Additionally, this section of the wall is the earliest part opened to visitors.