diff --git a/csst_mci_sim/csst_mci_sim.py b/csst_mci_sim/csst_mci_sim.py
index 413cd675a087770f22a632f9a7153e0710ff3386..e6e135afdb5b80765ef58327ba1d486f4f3d22b6 100644
--- a/csst_mci_sim/csst_mci_sim.py
+++ b/csst_mci_sim/csst_mci_sim.py
@@ -1713,9 +1713,10 @@ class MCIsimulator():
         theta = rotTelPos - rotSkyPos          
         
         ############ load star data catlog #####################            
-        starcat='selection_20230517_concat.csv'
-        #starcat='selection_yuyong20230609_sim.csv'        
+        ##starcat='selection_20230517_concat.csv'
         
+        starcat='GaiaSource_675688-675713'
+             
         self.log.info('Stat catlog file name is %s' % (starcat))
         
         print('test 0  ======================')