diff --git a/csst_ifs_gehong/config.py b/csst_ifs_gehong/config.py
index 073224f035aeeb975c3398b9e7892ff0f1f34864..46da374b365c903beca5f2022628add5a5a46541 100644
--- a/csst_ifs_gehong/config.py
+++ b/csst_ifs_gehong/config.py
@@ -3,7 +3,8 @@ import numpy as np
 
 class config():
     """
-    The configuration of spectral modeling. The default value is used for ETC calculation.
+    The configuration of spectral modeling. The default value is used for
+    ETC calculation.
 
     Parameters
     ----------
@@ -22,8 +23,8 @@ class config():
     dpix : float, optional
         Pixel size in the spatial direction, by default 0.2arcsec
     """
-    def __init__(self, wave_min=3500.0, wave_max=10000.0, dlam=2.0, 
-                 nx=30, ny=30, dpix=0.2):
+    def __init__(self, wave_min=3500.0, wave_max=10000.0, dlam=2.0, nx=30,
+                 ny=30, dpix=0.2):
         self.dlam = dlam
         self.wave = np.arange(wave_min, wave_max, dlam)
         self.wave_min = wave_min
diff --git a/csst_ifs_gehong/map2d.py b/csst_ifs_gehong/map2d.py
index 13e68c5e16cb20377cb9dd93d80cdb775939534b..b5f738797729319b540f08be45b571265cc34f1c 100644
--- a/csst_ifs_gehong/map2d.py
+++ b/csst_ifs_gehong/map2d.py
@@ -8,7 +8,8 @@ from skimage.transform import resize
 def Sersic2D(x, y, mag=12.0, r_eff=1.0, n=2.0, ellip=0.5,
              theta=0.0, x_0=0.0, y_0=0.0, pixelscale=0.01):
     """
-    Sersic2D: Caculate the surface brightness at given spatial position base on the Sersic model.
+    Sersic2D: Caculate the surface brightness at given spatial position
+     base on the Sersic model.
 
     Parameters
     ----------