1.Var estimation results: fdi has a long-term negative impact on trade, and trade has a long-term positive impact on fdi.

Johansen cointegration test: 1. Tracking statistics: no cointegration relationship; 2. Maximum characteristic root statistics: there is no cointegration relationship.

Third, ADF unit root test: FDI and trade are both second-order unit processes.

Fourth, Granger causality test: trade is the Granger cause of fdi.

Software: EViews5.0