diff --git a/index.js b/index.js
index 3657990..087c6cc 100644
--- a/index.js
+++ b/index.js
@@ -150,11 +150,10 @@ const Upload = function Upload(bucketName, opts) {
 
   if (!this.opts.url && this.opts.aws.region === 'us-east-1') {
     this.opts.url = `https://s3.amazonaws.com/${bucketName}/`;
+  } else if (!this.opts.url && this.opts.aws.region === 'cn-north-1') {
+    this.opts.url = `https://s3.${this.opts.aws.region}.amazonaws.com/${bucketName}/`;
   } else if (!this.opts.url) {
-    this.opts.url = [
-      'https://s3-', this.opts.aws.region,
-      '.amazonaws.com/', bucketName, '/',
-    ].join('');
+    this.opts.url = `https://s3-${this.opts.aws.region}.amazonaws.com/${bucketName}/`;
   }
 
   this._randomPath = this.opts.randomPath || uuid;
diff --git a/test/index.js b/test/index.js
index a685f28..2cf3217 100644
--- a/test/index.js
+++ b/test/index.js
@@ -132,15 +132,17 @@ describe('Upload', () => {
         url: 'https://s3.amazonaws.com/myBucket/',
       });
     });
-    it('sets default url based on AWS region', () => {
-      upload = new Upload('b', {
-        aws: {
-          region: 'my-region-1',
-        },
-      });
+
+    it('sets correct url for custom AWS region', () => {
+      upload = new Upload('b', { aws: { region: 'my-region-1' } });
       assert.equal(upload.opts.url, 'https://s3-my-region-1.amazonaws.com/b/');
     });
 
+    it('sets correct url for cn-north-1 AWS region', () => {
+      upload = new Upload('b', { aws: { region: 'cn-north-1' } });
+      assert.equal(upload.opts.url, 'https://s3.cn-north-1.amazonaws.com/b/');
+    });
+
     it('sets custom url', () => {
       upload = new Upload('b', {
         url: 'http://cdn.app.com/',