Passengers walk on the square of the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Zhu Guigen)

Policemen guard outside the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Zhu Guigen)

People are seen in the Ticket No. 1 Area at the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)

Passengers line up to buy tickets at the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Zhu Guigen)

Photo taken with a cell phone on March 2, 2014 shows people on the square of the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)

Passengers queue to enter the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)

People walk on the square of the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)

A passenger (L) carries his luggage to catch a train at the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)

A passenger buys train tickets from a machine at the Kunming Railway Station in Kunming, capital of southwest China's Yunnan Province, March 2, 2014. The order at the railway station has been restored to normal after an overnight terrorist attack which left 29 people dead and 130 others injured. (Xinhua/Lin Yiguang)