diff --git a/.gitignore b/.gitignore
index 0d3dd0a..aba9421 100644
--- a/.gitignore
+++ b/.gitignore
@@ -73,3 +73,9 @@ $RECYCLE.BIN/
 
 
 # End of https://www.gitignore.io/api/windows,osx,linux,jebtrain
+
+# For this project
+
+/gen/
+
+# End this project
diff --git a/bdchain/api/ac_chain.proto b/bdchain/api/ac_chain.proto
index e965743..3d1cea9 100644
--- a/bdchain/api/ac_chain.proto
+++ b/bdchain/api/ac_chain.proto
@@ -4,7 +4,7 @@ package bdchain.api;
 
 import "bdchain/api/common.proto";
 
-option go_package = "bdchain/api/ac_chain";
+option go_package = "bdchain/api/grpc/acchain";
 option java_package = "bdchain.api.grpc";
 option java_outer_classname = "AccountingChainProto";
 option java_multiple_files = true;
diff --git a/bdchain/api/common.proto b/bdchain/api/common.proto
index 2aa65c8..daeb65e 100644
--- a/bdchain/api/common.proto
+++ b/bdchain/api/common.proto
@@ -2,7 +2,7 @@ syntax = "proto3";
 
 package bdchain.api;
 
-option go_package = "bdchain/api/common";
+option go_package = "bdchain/api/grpc/common";
 option java_package = "bdchain.api.grpc";
 option java_outer_classname = "CommonProto";
 option java_multiple_files = true;
diff --git a/bdchain/api/tx_ledger.proto b/bdchain/api/tx_ledger.proto
index f82e235..d47e7f1 100644
--- a/bdchain/api/tx_ledger.proto
+++ b/bdchain/api/tx_ledger.proto
@@ -5,7 +5,7 @@ package bdchain.api;
 import "google/protobuf/empty.proto";
 import "bdchain/api/common.proto";
 
-option go_package = "bdchain/api/tx_ledger";
+option go_package = "bdchain/api/grpc/txledger";
 option java_package = "bdchain.api.grpc";
 option java_outer_classname = "TransactionLedgerProto";
 option java_multiple_files = true;
diff --git a/gen.bat b/gen.bat
index 1d4836f..d3f2a82 100644
--- a/gen.bat
+++ b/gen.bat
@@ -1,4 +1,10 @@
-mkdir gen\go
-protoc -I . --go_out=plugins=grpc:gen/go bdchain/api/common.proto
-protoc -I . --go_out=plugins=grpc:gen/go bdchain/api/tx_ledger.proto
-protoc -I . --go_out=plugins=grpc:gen/go bdchain/api/ac_chain.proto
+@echo off
+set dir=.\gen\go
+
+if not exist %dir% mkdir %dir%
+protoc -I . --go_out=plugins=grpc:%dir% bdchain/api/common.proto
+protoc -I . --go_out=plugins=grpc:%dir% bdchain/api/tx_ledger.proto
+protoc -I . --go_out=plugins=grpc:%dir% bdchain/api/ac_chain.proto
+
+echo All Done!
+pause.