diff --git a/examples/seq2seq_demo.py b/examples/seq2seq_demo.py
index 2f024c17..78c3a240 100644
--- a/examples/seq2seq_demo.py
+++ b/examples/seq2seq_demo.py
@@ -34,7 +34,7 @@ def main():
                         )
     parser.add_argument("--model_dir", default="output/bertseq2seq/", type=str, help="Dir for model save.")
     parser.add_argument("--arch",
-                        default="bertseq2seq", type=str,
+                        default="convseq2seq", type=str,
                         help="The name of the task to train selected in the list: " + ", ".join(
                             ['seq2seq', 'convseq2seq', 'bertseq2seq']),
                         )
@@ -52,7 +52,7 @@ def main():
     parser.add_argument("--embed_size", default=128, type=int, help="Embedding size.")
     parser.add_argument("--hidden_size", default=128, type=int, help="Hidden size.")
     parser.add_argument("--dropout", default=0.25, type=float, help="Dropout rate.")
-    parser.add_argument("--epochs", default=10, type=int, help="Epoch num.")
+    parser.add_argument("--epochs", default=200, type=int, help="Epoch num.")
 
     args = parser.parse_args()
     print(args)
diff --git a/pycorrector/seq2seq/README.md b/pycorrector/seq2seq/README.md
index 3143c6c1..4d51b664 100644
--- a/pycorrector/seq2seq/README.md
+++ b/pycorrector/seq2seq/README.md
@@ -22,7 +22,7 @@ tensorboardX
 
 ## Demo
 
-- bertseq2seq demo
+- convseq2seq demo
 
 示例[seq2seq_demo.py](../../examples/seq2seq_demo.py)
 ```
@@ -93,3 +93,7 @@ predict: 王天华开心地一直说话。
 ```
 python preprocess.py
 ```
+
+### release models
+
+基于SIGHAN2015数据集训练的seq2seq和convseq2seq模型，已经release到github，通过[github models]()获取。
diff --git a/pycorrector/seq2seq/seq2seq_model.py b/pycorrector/seq2seq/seq2seq_model.py
index db451b28..08189b95 100644
--- a/pycorrector/seq2seq/seq2seq_model.py
+++ b/pycorrector/seq2seq/seq2seq_model.py
@@ -520,7 +520,7 @@ def train(
 
         if args.model_name and os.path.exists(args.model_name):
             try:
-                # set global_step to gobal_step of last saved checkpoint from model path
+                # set global_step to global_step of last saved checkpoint from model path
                 checkpoint_suffix = args.model_name.split("/")[-1].split("-")
                 if len(checkpoint_suffix) > 2:
                     checkpoint_suffix = checkpoint_suffix[1]
diff --git a/pycorrector/version.py b/pycorrector/version.py
index 61998de9..f36fb9ee 100644
--- a/pycorrector/version.py
+++ b/pycorrector/version.py
@@ -3,4 +3,4 @@
 @author:XuMing(xuming624@qq.com)
 @description: version
 """
-__version__ = '0.4.4'
+__version__ = '0.4.5'