diff --git a/bench.sh b/bench.sh
index 4b9fd40..2670a33 100644
--- a/bench.sh
+++ b/bench.sh
@@ -71,16 +71,16 @@ speed_test() {
 
 speed() {
     speed_test '' 'Speedtest.net'
-	speed_test '29071' 'Chengdu, CN'
-	speed_test '17584' 'Chongqing, CN'
-	speed_test '29105' 'Xi an, CN'
-	speed_test '28225' 'Changsha, CN'
-	speed_test '29353' 'Wuhan, CN'
-	speed_test '16145' 'Lanzhou, CN'
-	speed_test '3973' 'Lanzhou, CN'
-	speed_test '41910' 'Zhengzhou, CN'
-	speed_test '36996' 'Guiyang, CN'
-	speed_test '24447' 'Shanghai, CN'
+    speed_test '29071' 'Chengdu, CN'
+    speed_test '17584' 'Chongqing, CN'
+    speed_test '29105' 'Xi an, CN'
+    speed_test '28225' 'Changsha, CN'
+    speed_test '29353' 'Wuhan, CN'
+    speed_test '16145' 'Lanzhou, CN'
+    speed_test '3973' 'Lanzhou, CN'
+    speed_test '41910' 'Zhengzhou, CN'
+    speed_test '36996' 'Guiyang, CN'
+    speed_test '24447' 'Shanghai, CN'
     speed_test '26352' 'Nanjing, CN'
     speed_test '27594' 'Guangzhou, CN'
     speed_test '32155' 'Hongkong, CN'