diff --git a/index.js b/index.js
index 9a07a5a..a021978 100644
--- a/index.js
+++ b/index.js
@@ -1,13 +1,35 @@
-const { KiviPlugin } = require("@kivibot/core");
+const { KiviPlugin, segment } = require("@kivibot/core");
+const { execSync } = require("child_process");
 
 const plugin = new KiviPlugin("demo", "0.1.0");
 
+function vnstati() {
+  execSync("vnstati -L -i eth0 -s -o s.png");
+  execSync("vnstati -L -i eth0 -h -o h.png");
+  execSync("vnstati -L -i eth0 -hg -o hg.png");
+}
+
 plugin.onMounted(() => {
   plugin.cron("0 8 * * *", (bot, admins) => {
+    vnstati();
     admins.forEach((admin) => {
-      bot.sendPrivateMsg(admin, "早上好！");
+      bot.sendPrivateMsg(admin, [
+        "昨日流量使用数据：\n",
+        segment.image("s.png"),
+        segment.image("h.png"),
+        segment.image("hg.png"),
+      ]);
     });
   });
+  plugin.onAdminCmd("vnstat", (event, params, options) => {
+    vnstati();
+    event.reply([
+      "过去24小时内流量使用数据：\n",
+      segment.image("s.png"),
+      segment.image("h.png"),
+      segment.image("hg.png"),
+    ]);
+  });
 });
 
 module.exports = { plugin };