探索了一下百度访问不了的问题，没思路

app/src/main/java/com/pkusz/min_vpn_client/services/VpnPreparation.java

@@ -316,6 +316,7 @@ public class VpnPreparation implements VpnPreparationInterface{
         System.out.println("!!!allocatedAddress: "+allocatedAddress);
         builder.addAddress(allocatedAddress,24);
         builder.addRoute("0.0.0.0",0);
+//        builder.addDnsServer("114.114.114.114");
         builder.addDnsServer("8.8.8.8");
 
         // 2. 创建一个接口