diff --git a/data/cncity/100000.txt b/data/cncity/100000.txt
index 4549a365..9db7b878 100644
--- a/data/cncity/100000.txt
+++ b/data/cncity/100000.txt
@@ -439,7 +439,7 @@
 45.253.72.0/22
 45.253.130.0/23
 45.253.244.0/22
-45.254.0.0/20
+45.254.0.0/21
 45.254.48.0/21
 45.254.60.0/22
 45.254.64.0/19
diff --git a/data/cncity/110000.txt b/data/cncity/110000.txt
index 27964622..4f0c5c4c 100644
--- a/data/cncity/110000.txt
+++ b/data/cncity/110000.txt
@@ -781,6 +781,7 @@
 45.253.84.0/22
 45.253.120.0/23
 45.253.123.0/24
+45.254.8.0/21
 45.254.16.0/22
 45.254.29.0/24
 45.254.30.0/23
diff --git a/data/country/CN/CN-BJ.txt b/data/country/CN/CN-BJ.txt
index 27964622..4f0c5c4c 100644
--- a/data/country/CN/CN-BJ.txt
+++ b/data/country/CN/CN-BJ.txt
@@ -781,6 +781,7 @@
 45.253.84.0/22
 45.253.120.0/23
 45.253.123.0/24
+45.254.8.0/21
 45.254.16.0/22
 45.254.29.0/24
 45.254.30.0/23