Because of China's GFW, we need to specify hosts of flickr image servers. It comes to be this project.
72.30.196.151 farm1.staticflickr.com
72.30.196.152 farm2.staticflickr.com
98.137.205.236 farm3.staticflickr.com
98.137.204.89 farm4.staticflickr.com
68.142.227.95 farm5.staticflickr.com
98.139.21.45 farm6.staticflickr.com
98.139.235.135 farm7.staticflickr.com
72.30.198.116 farm8.staticflickr.com
72.30.198.117 farm9.staticflickr.com