## 3 Results  
### Calculation and Adjustment of Ecosystem Service Value  
The revised equivalence factor of Sichuan Province is 2237.64 CNY/ha, and the value coefficient table is calculated as shown in Table 2.  
The results of the sensitivity analysis (Table 3) show that the elasticity coefficient of each land use type is less than 1, the response of the ESV to the value coefficient is inelastic, and calculation results are accurate and reliable. The ESV was adjusted according to the spatial distribution of the ESs. As shown in Figure 4, the high- and low-value areas of the seven kinds of ESs all reflect spatial heterogeneity to a certain extent. Among them, high-value areas of grain production are concentrated in the bottom of the Sichuan Basin, especially in the Basin Mountain Area around the Dalou Mountains. These areas have flat terrain, sufficient water resources, and a large output of agricultural products that are rich in vari \begin{table}
\begin{tabular}{c c c c c c c} \hline \multicolumn{2}{c}{**Ecosystem**} & \multicolumn{5}{c}{**Land Use Type**} \\ \hline
**Primary** & **Secondary** & **Woodland** & **Grassland** & **Farmland** & **Waterbody** & **Bare Land** \\ \hline \multirow{2}{*}{Provisioning services} & Grain production & 765.92 & 998.01 & 2320.96 & 1230.11 & 46.42 \\  & Raw material production & 6588.19 & 795.89 & 862.21 & 773.78 & 88.43 \\ \hline \multirow{4}{*}{Regulating services} & Air quality regulation & 9664.87 & 3355.86 & 1610.81 & 1140.99 & 134.23 \\  & Climate regulation & 9117.36 & 3494.61 & 2172.93 & 4614.68 & 291.22 \\  & Water conservation & 8971.62 & 3334.20 & 1689.03 & 41,172.95 & 153.55 \\  & Waste disposal & 3825.52 & 2935.86 & 3091.55 & 33,028.48 & 578.28 \\ \hline \multirow{2}{*}{Supporting services} & Soil retention & 9095.49 & 5068.14 & 3325.96 & 927.65 & 384.64 \\  & Biodiversity & 10,097.60 & 4186.81 & 2283.71 & 7679.55 & 895.57 \\ \hline \multirow{2}{*}{Cultural services} & \multirow{2}{*}{Recreation provision} & 4607.67 & 1927.24 & 376.59 & 9835.59 & 531.65 \\ \hline \multirow{2}{*}{Cultural} & Total & 62,734.24 & 26,096.63 & 17,733.77 & 100,403.79 & 3103.99 \\ \hline \end{tabular}
\end{table} 
Table 2: Value coefficient of ecosystem services in Sichuan Province in 2018 (unit: CNY/ha). \begin{table}
\begin{tabular}{c c c c c} \hline \multicolumn{2}{c}{**Woodland**} & **Grassland** & **Farmland** & **Waterbody** & **Bare Land** \\ \hline Coefficient of sensitivity & 0.60 & 0.25 & 0.12 & 0.03 & 0.01 \\ \hline \end{tabular}
\end{table} 
Table 3: Results of the sensitivity analysis. mainly distributed in the Northwest Sichuan Plateau Area and in the Southwest Sichuan Mountains Region. Figure 4: Spatial distribution of ecosystem services in Sichuan Province: (**a**) grain production, (**b**) raw material production, (**c**) air quality regulation, (**d**) climate regulation, (**e**) water conservation, (**f**) soil retention, and (**g**) biodiversity conservation. Four types of ES, namely, raw material production, air quality regulation, climate regulation, and biodiversity conservation, show a similar spatial distribution pattern. High-value areas are mainly located in the Western Sichuan Basin and are mainly distributed in the Southwest Sichuan Mountains Region and Basin Mountain Area. The higher quality of services is partly due to high-density plant distribution and less human disturbance in this area. Relatively speaking, the areas near the Sichuan Basin are characterized by low-value accumulation. The spatial aggregation degree of water conservation is the most obvious, and the intensity of rainfall and different climatic characteristics within regions affect the spatial distribution of water conservation to a great extent. High-value areas are mainly distributed in the Basin Mountain Area, especially in the Qionglai Mountains and Dadu River, and some of the high-value areas are located in the Dalou Mountains. There is an obvious low-value accumulation in the Northwest Sichuan Plateau Area and in the Basin Mountain Area.