More funds, greater awareness needed to preserve one of the world's ancient wonders, Wang Kaihao reports.

Wang Gang leads local efforts to preserve the Great Wall in Zhangjiakou, which is a city in northern China's Hebei province. He and a tiny team from the municipal administration patrol some 1,800 kilometers of the Wall that zigzags through mountains, in practices that have been going on since 2013, with four major patrols a year and each lasting a minimum of 45 days.

Wang expects data updating of the Wall in Zhangjiakou to be completed in the next three years. The expansion of construction activities in urban and rural areas of Zhangjiakou has made it necessary to have regular patrols of the Wall, he says.