Flower decorations are set to greet the National Day in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 30, 2014. (Xinhua/Liu Kun)

Flower decorations are set to greet the National Day in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 30, 2014. (Xinhua/Liu Kun)

National flag and lanterns are hung to greet the National Day in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 30, 2014. (Xinhua/Purbu Zhaxi)

National flags and lanterns are hung to greet the National Day in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 30, 2014. (Xinhua/Liu Kun)

Flower decorations are set to greet the National Day in front of the Potala Palace in Lhasa, capital of southwest China's Tibet Autonomous Region, Sept. 30, 2014. (Xinhua/Liu Kun)