diff --git a/lib/short-doc-url.js b/lib/short-doc-url.js
index a5c6dc4..6c2b141 100644
--- a/lib/short-doc-url.js
+++ b/lib/short-doc-url.js
@@ -1,13 +1,19 @@
 'use strict';
 const got = require('got');
 const locale = require('./locale');
-const isCI = require('ci-info').isCI;
-const inGFW = locale === 'zh_CN' && (isCI || new Date().getTimezoneOffset() === -480);
-const shorturlCache = require(inGFW ? './shorturl_cn.json' : './shorturl.json');
+const ci = require('ci-info');
 const googl = require('goo.gl');
+const inGFW = require('in-gfw');
+
 // Set a developer key (_required by Google_; see http://goo.gl/4DvFk for more info.)
 googl.setKey('AIzaSyACqNSi3cybDvDfWMaPyXZEzQ6IeaPehLE');
 
+const isInGFW = ci.isCI && ci.name ? Promise.resolve(locale === 'zh_CN') : inGFW.os();
+
+const shorturlCache = isInGFW.then(inGFW => {
+	return require(inGFW ? './shorturl_cn.json' : './shorturl.json');
+});
+
 function shortDocUrl (error) {
 	if (!error.doc) {
 		return error;
@@ -23,20 +29,23 @@ function shortDocUrl (error) {
 }
 
 function shortUrl (url) {
-	const urlLowerCase = url.toLowerCase();
-	if (shorturlCache[urlLowerCase]) {
-		return Promise.resolve(shorturlCache[urlLowerCase]);
-	}
-
-	if (inGFW) {
-		return got(`http://api.t.sina.com.cn/short_url/shorten.json?source=3271760578&url_long=${encodeURIComponent(url)}`, {
-			json: true,
-		}).then(result => {
-			return result.body[0].url_short;
+	return shorturlCache.then(shorturlCache => {
+		const urlLowerCase = url.toLowerCase();
+		if (shorturlCache[urlLowerCase]) {
+			return shorturlCache[urlLowerCase];
+		}
+		return isInGFW.then(inGFW => {
+			if (inGFW) {
+				return got(`http://api.t.sina.com.cn/short_url/shorten.json?source=3271760578&url_long=${encodeURIComponent(url)}`, {
+					json: true,
+				}).then(result => {
+					return result.body[0].url_short;
+				});
+			} else {
+				return googl.shorten(url);
+			}
 		});
-	} else {
-		return googl.shorten(url);
-	}
+	});
 }
 
 module.exports = function (errors) {
diff --git a/package.json b/package.json
index 63df8c5..e0a2f06 100644
--- a/package.json
+++ b/package.json
@@ -16,6 +16,7 @@
     "fs-extra": "^5.0.0",
     "goo.gl": "^0.1.4",
     "got": "^8.3.0",
+    "in-gfw": "^1.0.0",
     "is-windows": "^1.0.2",
     "js-yaml": "^3.11.0",
     "junit-report-builder": "^1.3.0",
diff --git a/scripts/shorturl.js b/scripts/shorturl.js
index 1ff4eab..ac0ea6c 100644
--- a/scripts/shorturl.js
+++ b/scripts/shorturl.js
@@ -337,6 +337,7 @@ Promise.all([
 			'add',
 			'lib/*.json',
 		]);
+		process.exitCode = 127;
 	}
 });
 
diff --git a/test/api.test.js b/test/api.test.js
index 822ab3e..67a9caf 100644
--- a/test/api.test.js
+++ b/test/api.test.js
@@ -27,12 +27,7 @@ describe('API', () => {
 			if (!errors[0].docShort) {
 				return;
 			}
-			const locale = require('../lib/locale');
-			if (locale !== 'zh_CN') {
-				assert.ok(/^https?:\/\/goo\.gl\//.test(errors[0].docShort));
-			} else {
-				assert.ok(/^https?:\/\/(goo\.gl|t\.cn)\//.test(errors[0].docShort));
-			}
+			assert.ok(/^https?:\/\/(goo\.gl|t\.cn)\//.test(errors[0].docShort));
 		});
 	});
 
@@ -44,28 +39,31 @@ describe('API', () => {
 		});
 	});
 
-	it('short-doc-url (default)', () => {
+	it('short-doc-url (in GFW)', () => {
 		const shortDocUrl = proxyquire('../lib/short-doc-url', {
-			'./locale': 'en_US',
+			'./locale': 'zh_CN',
+			'in-gfw': {
+				os: () => Promise.resolve(true),
+			},
 		});
 		return shortDocUrl([{
 			doc: 'https://stylelint.io/user-guide/rules/indentation/',
 		}]).then(errors => {
-			assert.equal(errors[0].docShort, 'https://goo.gl/NVQ9aa');
+			assert.equal(errors[0].docShort, 'http://t.cn/Ro8Mjw5');
 		});
 	});
 
-	it('short-doc-url (in GWF)', () => {
-		const getTimezoneOffset = Date.prototype.getTimezoneOffset;
+	it('short-doc-url (out GFW)', () => {
 		const shortDocUrl = proxyquire('../lib/short-doc-url', {
-			'./locale': 'zh_CN',
+			'./locale': 'en_US',
+			'in-gfw': {
+				os: () => Promise.resolve(false),
+			},
 		});
-		Date.prototype.getTimezoneOffset = () => (-480);
 		return shortDocUrl([{
 			doc: 'https://stylelint.io/user-guide/rules/indentation/',
 		}]).then(errors => {
-			Date.prototype.getTimezoneOffset = getTimezoneOffset;
-			assert.equal(errors[0].docShort, 'http://t.cn/Ro8Mjw5');
+			assert.equal(errors[0].docShort, 'https://goo.gl/NVQ9aa');
 		});
 	});