diff --git a/main.py b/main.py
index 104ecc8..af71d81 100644
--- a/main.py
+++ b/main.py
@@ -62,7 +62,7 @@ class MyPlugin(Star):
         time = [];V = [];a = [];b = []
         for i in range(0,10):
             time.append(round(random.uniform(1, 600), 2))
-            V.append(round(random.uniform(0.01,100), 2)) if i==0 else V.append(round(random.uniform(1, V[i-1]), 2))
+            V.append(round(random.uniform(0.01,100), 2)) if i==0 else V.append(round(random.uniform(1, V[i-1]+1), 2))
             a.append(time_long(time[i]))
             b.append(volume(V[i]))  
         sql = "INSERT INTO dajiao (openid, timelong, volume) VALUES (%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s),(%s, %s, %s)"