diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 862834d..b1c4cdb 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -14,9 +14,20 @@ Current changes
 Added
 -----
 
+* Introduce helper module.
+
+* Introduce 'settings.ini' file which has a configuration for
+  aqt module.
+
 Changed
 -------
 
+* Select mirror site before accessing repository database.
+  This will speed-up installation process.
+
+* Now don't install extra modules when installing 'wasm_32' arch.
+  You should explicitly specify it with '-m' option.
+
 Fixed
 -----
 
diff --git a/aqt/cli.py b/aqt/cli.py
index b04c9f1..47f5c08 100644
--- a/aqt/cli.py
+++ b/aqt/cli.py
@@ -30,6 +30,7 @@ import sys
 from packaging.version import Version, parse
 
 from aqt.archives import QtArchives, ToolArchives
+from aqt.helper import altlink
 from aqt.installer import QtInstaller
 from aqt.settings import Settings
 
@@ -98,6 +99,9 @@ class Cli():
             if not mirror.startswith('http://') or mirror.startswith('https://') or mirror.startswith('ftp://'):
                 args.print_help()
                 exit(1)
+        else:
+            new_url = altlink('https://download.qt.io/timestamp.txt', blacklist=self.settings.blacklist)
+            mirror = new_url[:-14]
         return mirror
 
     def _check_modules_arg(self, qt_version, modules):
diff --git a/aqt/helper.py b/aqt/helper.py
new file mode 100644
index 0000000..3466a8a
--- /dev/null
+++ b/aqt/helper.py
@@ -0,0 +1,42 @@
+import xml.etree.ElementTree as ElementTree
+
+import requests
+
+
+def altlink(url, priority=None, blacklist=None):
+    '''Download .meta4 metalink version4 xml file and parse it.'''
+
+    mirrors = {}
+    url = url
+    try:
+        m = requests.get(url + '.meta4')
+    except requests.exceptions.ConnectionError:
+        return
+    else:
+        mirror_xml = ElementTree.fromstring(m.text)
+        for f in mirror_xml.iter("{urn:ietf:params:xml:ns:metalink}file"):
+            for u in f.iter("{urn:ietf:params:xml:ns:metalink}url"):
+                pri = u.attrib['priority']
+                mirrors[pri] = u.text
+
+    if len(mirrors) == 0:
+        # no alternative
+        return url
+    if priority is None:
+        if blacklist is not None:
+            for ind in range(len(mirrors)):
+                mirror = mirrors[str(ind + 1)]
+                black = False
+                for b in blacklist:
+                    if mirror.startswith(b):
+                        black = True
+                        continue
+                if black:
+                    continue
+                return mirror
+        else:
+            for ind in range(len(mirrors)):
+                mirror = mirrors[str(ind + 1)]
+                return mirror
+    else:
+        return mirrors[str(priority)]
diff --git a/aqt/installer.py b/aqt/installer.py
index 469ec4b..8f3b2b9 100644
--- a/aqt/installer.py
+++ b/aqt/installer.py
@@ -23,7 +23,6 @@
 import functools
 import os
 import sys
-import xml.etree.ElementTree as ElementTree
 from logging import getLogger
 from multiprocessing.dummy import Pool
 from operator import and_
@@ -35,9 +34,6 @@ if sys.version_info > (3, 5):
     import py7zr
 
 NUM_PROCESS = 3
-blacklist = ['http://mirrors.ustc.edu.cn',
-             'http://mirrors.tuna.tsinghua.edu.cn',
-             'http://mirrors.geekpie.club']
 
 
 class BadPackageFile(Exception):
@@ -62,15 +58,7 @@ class QtInstaller:
         url = package.url
         print("-Downloading {}...".format(url))
         try:
-            r = requests.get(url, stream=True, allow_redirects=False)
-            if r.status_code == 302:
-                # tsinghua.edu.cn is problematic and it prohibit service to specific geo location.
-                # we will use another redirected location for that.
-                newurl = r.headers['Location']
-                mml = Metalink(url)
-                newurl = mml.altlink(blacklist=blacklist)
-                print('Redirected to new URL: {}'.format(newurl))
-                r = requests.get(newurl, stream=True, allow_redirects=True)
+            r = requests.get(url, stream=True)
         except requests.exceptions.ConnectionError as e:
             print("Caught download error: %s" % e.args)
             return False
@@ -140,44 +128,3 @@ class QtInstaller:
         except IOError as e:
             self.logger.error("Configuration file generation error: %s\n", e.args, exc_info=True)
             raise e
-
-
-class Metalink:
-    '''Download .meta4 metalink version4 xml file and parse it.'''
-
-    def __init__(self, url):
-        self.mirrors = {}
-        self.url = url
-        try:
-            m = requests.get(url + '.meta4')
-        except requests.exceptions.ConnectionError:
-            return
-        else:
-            mirror_xml = ElementTree.fromstring(m.text)
-            for f in mirror_xml.iter("{urn:ietf:params:xml:ns:metalink}file"):
-                for u in f.iter("{urn:ietf:params:xml:ns:metalink}url"):
-                    pri = u.attrib['priority']
-                    self.mirrors[pri] = u.text
-
-    def altlink(self, priority=None, blacklist=None):
-        if len(self.mirrors) == 0:
-            # no alternative
-            return self.url
-        if priority is None:
-            if blacklist is not None:
-                for ind in range(len(self.mirrors)):
-                    mirror = self.mirrors[str(ind + 1)]
-                    black = False
-                    for b in blacklist:
-                        if mirror.startswith(b):
-                            black = True
-                            continue
-                    if black:
-                        continue
-                    return mirror
-            else:
-                for ind in range(len(self.mirrors)):
-                    mirror = self.mirrors[str(ind + 1)]
-                    return mirror
-        else:
-            return self.mirrors[str(priority)]
diff --git a/docs/internals.rst b/docs/internals.rst
index 08c0468..85a3c9b 100644
--- a/docs/internals.rst
+++ b/docs/internals.rst
@@ -29,8 +29,15 @@ Installer module
     :members:
 
 
-Cli modules
------------
+Cli module
+----------
 
 .. autoclass:: aqt.cli.Cli
     :members:
+
+
+Helper module
+-------------
+
+.. automodule:: aqt.helper
+    :members:
\ No newline at end of file