use taobao rubygems.

Gemfile

@@ -1,4 +1,4 @@
-source "https://rubygems.org"
+source "http://ruby.taobao.org"
 
 # Declare your gem's dependencies in china_city.gemspec.
 # Bundler will treat runtime dependencies like base dependencies, and

Gemfile.lock

@@ -6,7 +6,7 @@ PATH
       rails (~> 4.0.0)
 
 GEM
-  remote: https://rubygems.org/
+  remote: http://ruby.taobao.org/
   specs:
     actionmailer (4.0.0)
       actionpack (= 4.0.0)

spec/dummy/app/assets/javascripts/application.js

@@ -9,5 +9,6 @@
 //
 // Read Sprockets README (https://github.com/sstephenson/sprockets#sprockets-directives) for details
 // about supported directives.
+//= require 'jquery'
 //= require 'china_city/jquery.china_city'
 //= require_tree .