In 2021，key public opinions involving World Cultural Heritage properties in China registered the lowest number over the past three years. The Grand Canal for the first time attracted the largest number of public opinions，due to the conservation，transmission and use of its culture and the construction of the National Culture Park of the Grand Canal. Historic buildings and ancient sites continued to receive inadequate attention. Publicity，presentation and use remained the most focused area to draw the attention of the public and media. Improper behaviors of tourists still marked the principal factor to generate negative public opinion.