Photo shows a wooden bridge on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows a wooden bridge on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows a wooden bridge on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows a wooden bridge on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows a wooden bridge on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows prayer flags on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]

Photo shows a decoration on the Tang-Tubo Ancient Road. As an important road in Chinese history, the Tang-Tubo Ancient Road has also been the only way from inland to Qinghai Province and Tibet Autonomous Region as well as countries like Nepal and India since Tang Dynasty (618-907). The over-3,000-kilometer road starts from Xi’an, capital of Shanxi Province, through Gansu and Qinghai provinces, and ends in Lhasa, capital of Tibet Autonomous Region. It is also well known as the "South Silk Road". [Photo/China Tibet Online]