The recent progress in conservation of cultural heritage in China is reflected in the ongoing consolidation of the foundation for its heritage work. China’s Third National Heritage Site Inventory, launched in the past decade and lasting four and one-half years, was the largest ever carried out in the country. Special surveys of the Great Wall, the Grand Canal, the Silk Road, and underwater heritage resources were conducted at the same time. As a result of these surveys, the number of registered immovable cultural properties soared from 300,000 to 760,000, while the number of state priority protected sites increased from 750 in 2000 to 4,296 today. In addition, the number of priority protected sites at regional and local levels also increased significantly.

CULTURAL HERITAGE CONSERVATION IN CHINA
https://www.getty.edu/conservation/publications_resources/newsletters/31_1/practices_achievements.html