diff --git a/apiclient.py b/apiclient.py
index cd772423..e239b3e0 100644
--- a/apiclient.py
+++ b/apiclient.py
@@ -1,3 +1,5 @@
+import os
+
 import requests
 
 
@@ -16,4 +18,4 @@ class ApiClient:
             return None
 
 
-client = ApiClient('http://127.0.0.1:5000/openqq')
+client = ApiClient(os.environ.get('QQ_API_URL'))
diff --git a/app.py b/app.py
index e55290cd..3e4bd312 100644
--- a/app.py
+++ b/app.py
@@ -107,4 +107,4 @@ def _load_commands():
 
 if __name__ == '__main__':
     _load_commands()
-    app.run(host='127.0.0.1', port=8888)
+    app.run(host=os.environ.get('HOST'), port=os.environ.get('PORT'))
diff --git a/commands/todayinhistory.py b/commands/todayinhistory.py
new file mode 100644
index 00000000..68af4af2
--- /dev/null
+++ b/commands/todayinhistory.py
@@ -0,0 +1,29 @@
+import requests
+from lxml import etree
+
+from command import CommandRegistry
+from commands import core
+
+__registry__ = cr = CommandRegistry()
+
+
+@cr.register('today_in_history', '历史上的今天')
+def today_in_history(_, ctx_msg):
+    core.echo('正在查询，请稍等……', ctx_msg)
+    resp = requests.get('http://tool.lu/todayonhistory/')
+    ok = False
+    if resp.status_code == 200:
+        html = etree.HTML(resp.text)
+        li_elems = html.xpath('//ul[@id="tohlis"]/li')
+        # reply = reduce(lambda x, y: x.text + '\n' + y.text, li_elems)
+        step = 10
+        for start in range(0, len(li_elems), step):
+            reply = ''
+            for item in li_elems[start:start + step]:
+                reply += item.text + '\n'
+            reply = reply.rstrip()
+            core.echo(reply, ctx_msg)
+        core.echo('以上～', ctx_msg)
+        ok = True
+    if not ok:
+        core.echo('很抱歉，网络出错了……建议等会儿再试吧～', ctx_msg)
diff --git a/commands/zhihu.py b/commands/zhihu.py
index 1e58a9cc..1d718b50 100644
--- a/commands/zhihu.py
+++ b/commands/zhihu.py
@@ -147,7 +147,7 @@ def _subscribe_interactively(args_text, ctx_msg, source):
         if s.data['need_confirm']:
             if a.strip() != '1':
                 # Cancel
-                core.echo('已放弃更改～')
+                core.echo('已放弃更改～', c)
                 return True
         core.echo('请发送想要获取推送的时间（格式如 20:05）：', c)
         s.state += 1