diff --git a/demo.py b/demo.py
index 8c68c1be..293166ed 100644
--- a/demo.py
+++ b/demo.py
@@ -39,10 +39,11 @@ def appapi_illust(aapi):
     json_result = aapi.illust_comments(59580629)
     print(json_result)
 
-    json_result = aapi.ugoira_metadata(51815717)
-    print(json_result)
-    metadata = json_result.ugoira_metadata
-    print(">>> frames=%d %s" % (len(metadata.frames), metadata.zip_urls.medium))
+    # (2020/01/28) Comment because 51815717 is deleted
+    # json_result = aapi.ugoira_metadata(51815717)
+    # print(json_result)
+    # metadata = json_result.ugoira_metadata
+    # print(">>> frames=%d %s" % (len(metadata.frames), metadata.zip_urls.medium))
 
 
 def appapi_recommend(aapi):
diff --git a/pixivpy3/bapi.py b/pixivpy3/bapi.py
index b2e28fc7..c4258f17 100644
--- a/pixivpy3/bapi.py
+++ b/pixivpy3/bapi.py
@@ -15,10 +15,26 @@ def __init__(self, **requests_kwargs):
         session.mount('https://', host_header_ssl.HostHeaderSSLAdapter())
         self.requests = session
 
-    def require_appapi_hosts(self, hostname="app-api.pixiv.net"):
+    def require_appapi_hosts(self, hostname="app-api.pixiv.net", timeout=3):
         """
-        通过1.0.0.1请求真实的ip地址
+        通过cloudflare的 DNS over HTTPS 请求真实的ip地址
         """
-        url = "https://1.0.0.1/dns-query?ct=application/dns-json&name=%s&type=A&do=false&cd=false" % hostname
-        response = requests.get(url)
+        url = "https://1.0.0.1/dns-query"   # 先使用1.0.0.1的地址
+        params = {
+            'ct': 'application/dns-json',
+            'name': hostname,
+            'type': 'A',
+            'do': 'false',
+            'cd': 'false',
+        }
+
+        try:
+            response = requests.get(url, params=params, timeout=timeout)
+        except Exception:
+            # 根据 #111 的反馈，部分地区无法访问1.0.0.1，此时尝试域名解析
+            url = "https://cloudflare-dns.com/dns-query"
+            response = requests.get(url, params=params, timeout=timeout)
+
+        # 返回第一个解析到的IP
         self.hosts = "https://" + response.json()['Answer'][0]['data']
+        return self.hosts