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.
Built on the Red Hill of Lhasa, Tibet, Potala Palace is the largest palace complex at this altitude in the world. Its grand architecture, rare cultural relics and devotional atmosphere attract visitors from around the world.