In the recent period, ultra-short domain names have become a popular trend. Since 6.cn was activated by Sixrooms and G.cn was released by Google, ultra-short domain names have increasingly gained popularity and attention within the industry. For example, the trial website purchased m.cn, the personal portal activated p.cn, and Danglai.com launched d.cn. Recently, Microsoft also activated the two ultra-short domain names w.cn and 9.cn.