diff --git a/csst_proto/config.py b/csst_proto/config.py
index 164744854e0b6bd786197d1f78c80a7740dc6bb4..e33cf9048b6cdced6f69d208dd1144781783f4fa 100644
--- a/csst_proto/config.py
+++ b/csst_proto/config.py
@@ -25,7 +25,8 @@ HERE: str = os.path.dirname(__file__)
 # 当config_path被指定时，会读取指定的config_path
 # 当config_path=None时，读取随包数据中的config/default_config.toml
 def read_config(config_path: Optional[str] = None):
-    """Get config info from a toml file.
+    """
+    Get config info from a toml file.
 
     Read a `toml` format config file.
     If `config_path` is specified, read that config.
diff --git a/csst_proto/flip_image.py b/csst_proto/flip_image.py
index ef5014e7705c4beaa43ef725e4d0769a4bb3e2aa..a95d4a364429bc3bbff00ea97f6e114de66e3aa4 100644
--- a/csst_proto/flip_image.py
+++ b/csst_proto/flip_image.py
@@ -62,7 +62,8 @@ def flip_image(image: np.ndarray, use_numpy: bool = False) -> np.ndarray:
 
 # 此函数读取了随包数据中的test_image.txt
 def read_default_image():
-    """Read default image.
+    """
+    Read default image.
 
     This function reads the default image associated with this package.
 
diff --git a/csst_proto/flip_image_in_parallel.py b/csst_proto/flip_image_in_parallel.py
index b466e3b36c5d80cfa6628a4298d8b9c48e6e0187..dc35acb913bf654cfe11065e2394d2c9d15f203d 100644
--- a/csst_proto/flip_image_in_parallel.py
+++ b/csst_proto/flip_image_in_parallel.py
@@ -16,7 +16,8 @@ from .flip_image import flip_image
 
 
 def flip_multiple_images_mp(images: list[np.ndarray], n_jobs: int) -> list[np.ndarray]:
-    """Flip input images in parallel.
+    """
+    Flip input images in parallel.
 
     Flip images in parallel with `multiprocessing`.
 
@@ -37,7 +38,8 @@ def flip_multiple_images_mp(images: list[np.ndarray], n_jobs: int) -> list[np.nd
 
 
 def flip_multiple_images_jl(images: list[np.ndarray], n_jobs: int) -> list[np.ndarray]:
-    """Flip input images in parallel.
+    """
+    Flip input images in parallel.
 
     Flip images in parallel with `joblib`.