## 4 Experiments
### Experimental Results  
This section presents the assessment results of the energy investment. Notice that Bi-LSTM module enables the model to deal with all 7-year statistics at once, and the following experimental results presented in this section are all computed based on 7-year data. Table 3 presents the weight of each indicator and sub-indicator, which are all calculated by self-attention layer. From it, one could draw a conclusion that the resource potential is the utmost crucial factor. It is intuitive that a country without any resource potential is not worthwhile to be invested at all. In the Chinese factor, the second important index implies the importance of keeping a friendly diplomatic relationship with the target country. Political risk deserves to be paid attention to, as well, since a stable political domestic situation of a country can help to secure foreign companies' investment. It is a bit unexpected that environment constraint and economic foundation have comparable weights. This is due to the fact that the climate warming challenge has currently become more severe, so more efforts are needed on constraining the environment degradation. The investment environment is the least important factor, which is also a bit unexpected. Energy investment is different from normal investment, so the traditional environment may simply not be that important in the energy field. \begin{table}
\begin{tabular}{c c c} \hline \hline
**Dimension** & **Weight of Dimensions** & **Indicators** & **Weight of Indicators** \\ \hline \hline \multirow{4}{*}{Investment environment} & \multicolumn{2}{c}{Starting a business} & 0.005 \\  & \multicolumn{2}{c}{Dealing with construction permits} & 0.008 \\  & \multicolumn{2}{c}{Getting electricity} & 0.012 \\  & \multicolumn{2}{c}{Paying tax} & 0.026 \\  & \multicolumn{2}{c}{Enforcing contracts} & 0.018 \\  & \multicolumn{2}{c}{Resolololololololumn{2}{c}{Resolololumnumn{2}{c}} \\ \hline \hline \multirow{4}{*}{Political risk} & \multicolumn{2}{c}{Government stability} & 0.037 \\  & \multicolumn{2}{c}{Internal conflict} & 0.033 \\  & \multicolumn{2}{c}{External conflict} & 0.014 \\  & \multicolumn{2}{c}{Corruption} & 0.026 \\  & \multicolumn{2}{c}{Law and order} & 0.016 \\  & \multicolumn{2}{c}{Democratic accountability} & 0.035 \\ \hline \hline \multirow{4}{*}{Economic foundation} & \multicolumn{2}{c}{GDP per capita} & 0.059 \\  & \multicolumn{2}{c}{Real GDP growth} & 0.013 \\  & \multicolumn{2}{c}{Annual inflation rate} & 0.010 \\  & \multicolumn{2}{c}{Budget balance as a percentage of GDP} & 0.024 \\  & \multicolumn{2}{c}{Foreign debt as a percentage of GDP} & 0.032 \\  & \multicolumn{2}{c}{Exchange rate stability} & 0.007 \\ \hline \hline \multirow{4}{*}{Environment constraint} & \multicolumn{2}{c}{Carbon dioxide emissions} & 0.019 \\  & \multicolumn{2}{c}{Nitrous oxide emissions} & 0.020 \\  & \multicolumn{2}{c}{Energy intensity} & 0.09 \\  & \multicolumn{2}{c}{Carbon dioxide intensity} & 0.012 \\  & \multicolumn{2}{c}{PM2.5} & 0.018 \\  & \multicolumn{2}{c}{Forest area (\% of land area)} & 0.069 \\ \hline \hline \multirow{4}{*}{Resource potential} & \multicolumn{2}{c}{Total oil production} & 0.033 \\  & \multicolumn{2}{c}{Crude oil proved reserves} & 0.054 \\  & \multicolumn{2}{c}{Dry natural gas production} & 0.048 \\  & \multicolumn{2}{c}{Proved reserves of natural gas} & 0.059 \\  & \multicolumn{2}{c}{Crude oil distillation capacity} & 0.032 \\  & \multicolumn{2}{c}{Total exports of refined petroleum products} & 0.034 \\ \hline \hline \multirow{4}{*}{Chinese factor} & \multicolumn{2}{c}{Outward FDI stock} & 0.020 \\  & \multicolumn{2}{c}{Years of China’s diplomatic relations} & 0.076 \\  & \multicolumn{2}{c}{Value of contracted projects} & 0.022 \\ \cline{1-1}  & \multicolumn{2}{c}{Persons abroad of contracted projects and labor services} & 0.044 \\ \cline{1-1}  & \multicolumn{2}{c}{Value of total imports from China} & 0.017 \\ \cline{1-1}  & \multicolumn{2}{c}{Value of total exports to China} & 0.018 \\ \hline \hline \end{tabular}
\end{table}