The renovation of a 700-year-old stretch of the Great Wall in Suizhong county in southwest Liaoning province has triggered a public outcry and scrutiny over claims of poor workmanship.

The little-known Xiaohekou section, which has a reputation among hikers as the most beautiful original Great Wall, is a nationally protected cultural relic. The restoration occurred in 2014 and drew public attention after someone recently posted photos online.

In the photos, the wall appears to have been covered in a smooth, white material. Local authorities say it's sandy soil.