Historians have urged for greater efforts to protect the western sections of the Great Wall in the wake of an official survey of the historic structure.

From July 6 and 12, the National Committee of the Chinese People's Political Consultative Conference, the country's top political advisory body, arranged for experts to check the condition of the Wall in Gansu province, which holds an estimated 3,600 km of the total length of 21,196.18 km of Great Wall built in different dynasties.

The team visited 10 major sites in five cities, including Dingxi, Wuwei, Zhangye, Jiayuguan and Jiuquan.