The Temporal Spatial Dynamic of Land Policy in China: Evidence from Policy Analysis Based on Machine Learning

Table 3

Number of policy texts and the proportion of each topic.

Topic	Number of policy texts	Proportion (%)
Cultivated land protection	7851	36.69
Land planning	2057	9.61
Land consolidation and utilization	2547	11.90
Land right confirmation and circulation	1323	6.18
Land expropriation and demolition	1955	9.14
Land development	5664	26.47
Total	21,397	100.00

Data source: the classification results of the land policy texts in 1998–2018 are obtained by authors.