A train arrives at a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times.(Xinhua/Liu Dongjun)

Passengers pass the security check in a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers queue to buy tickets in a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers queue to buy tickets in a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Crew members help a senior passenger at a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers head for a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers pass the security check in a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers take the booked tickets in a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers enter a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)

Passengers walk on the platform of a train station in Lhasa, capital of southwest China's Tibet Autonomous Region, Jan. 2, 2016. During the first two days of 2016, Lasha Railway Station had larger passenger flow volume than it in normal times. (Xinhua/Liu Dongjun)