diff --git a/data/cncity/100000.txt b/data/cncity/100000.txt
index 04a356e2..8c1c4975 100644
--- a/data/cncity/100000.txt
+++ b/data/cncity/100000.txt
@@ -1491,7 +1491,6 @@
 139.197.0.0/16
 144.48.90.0/23
 144.48.156.0/22
-144.48.181.0/24
 144.48.182.0/23
 144.48.184.0/22
 144.48.204.0/22
diff --git a/data/cncity/510000.txt b/data/cncity/510000.txt
index 5d3abeac..b2047458 100644
--- a/data/cncity/510000.txt
+++ b/data/cncity/510000.txt
@@ -427,7 +427,7 @@
 140.205.22.28/30
 140.205.22.36/30
 140.205.22.96/30
-144.48.180.0/24
+144.48.180.0/23
 148.70.0.0/16
 157.15.104.0/23
 157.20.246.0/23
diff --git a/data/cncity/510100.txt b/data/cncity/510100.txt
index 6443648d..5d10c31c 100644
--- a/data/cncity/510100.txt
+++ b/data/cncity/510100.txt
@@ -686,7 +686,7 @@
 140.205.22.28/30
 140.205.22.36/30
 140.205.22.96/30
-144.48.180.0/24
+144.48.180.0/23
 148.70.0.0/16
 159.226.140.0/22
 159.226.167.0/24
diff --git a/data/country/CN/CN-SC.txt b/data/country/CN/CN-SC.txt
index 5d3abeac..b2047458 100644
--- a/data/country/CN/CN-SC.txt
+++ b/data/country/CN/CN-SC.txt
@@ -427,7 +427,7 @@
 140.205.22.28/30
 140.205.22.36/30
 140.205.22.96/30
-144.48.180.0/24
+144.48.180.0/23
 148.70.0.0/16
 157.15.104.0/23
 157.20.246.0/23