World's worst restoration? China's Great Wall covered in cement

The Great Wall stretches from Hebei province in the east to Gansu province to the west, and stretches over 220,000 kilometers. This photo shows a section of the wall near the border of Liaoning and Hebei province that was repaired in 2014. Great Wall of China Society deputy director Dong Yaohui said the repair was done "very badly"

Tulou structures have existed for over 2,000 years. They were built by Hakka people. 46 Tulou structures, located in Fujian, are UNESCO world heritage sites.

The Cheng Kan Village is a historic village located in Anhui, a province in southern China. The village was built during the Ming Dynasty. This is one of the best examples of how villages and cities were planned. This one follows an eight diagram layout -- a Taoist concept embodying yin and yang.

The Dazu District is located in Chongqing. The Dazu Rock Carvings, which date back to the 9th century, are designated as a UNESCO heritage site. The artwork shows a fusion of Buddhist, Taoist and Confucian beliefs.

One of the minorities that is known to reside in the Guizhou area is the Dong ethnic group. Many Dong women in the village prefer to wear traditional dress, pictured above.

Pingyao, located in Shanxi province, is a traditional Han Chinese city that was established in the 14th century. It was considered to be the financial center of China from the 19th to early 20th century.

The Lion Grove Garden, located in Suzhou, was first built during the Yuan Dynasty in 1342. The garden was once home to the famed Chinese-American architect, I.M. Pei, and was repurchased by the family in the 1980s. Pei cites the Lion Grove Garden as a prominent influence in his work.

The Mogao Grottoes are located in the Gansu province in northwest China. The site was first constructed in 166 AD features Buddhist art from the 4th to 14th century.

A 700-year-old "wild" stretch of China's Great Wall has been covered in a smooth, white trail of cement under orders from Suizhong county's Cultural Relics Bureau,Sina reported on Wednesday.

The repairs were carried out in 2014, but they only came to public attention recently.

China covers portions of Great Wall with cement 00:40

It was an effort to restore parts of the wall which have fallen into disrepair and are not open to the public, but the restoration has been met with condemnation by social media users and advocates.

The repair work took place near the border of Liaoning and Hebei province and photos of the results were widely shared by Beijing News on Weibo this week.