diff --git a/data_process.py b/data_process.py
index 2663ef1..9c03628 100644
--- a/data_process.py
+++ b/data_process.py
@@ -89,7 +89,7 @@ def process_seq_monkey(chunk_size=50000):
 
             if len(doc_ids) > 1000000:
                 arr = np.array(doc_ids, dtype=np.uint16)
-                with open(f'./dataset/clean_seq_monkey.bin', 'wb') as f:
+                with open(f'./dataset/clean_seq_monkey.bin', 'ab') as f:
                     f.write(arr.tobytes())
                 doc_ids = []
 
@@ -220,7 +220,7 @@ if __name__ == "__main__":
     # 2: sft
     # 3: RL
     ################
-    process_type = 3
+    process_type = 1
 
     if process_type == 1:
         pretrain_process()