ICANN is testing out URLs in 11 languages other than those that supports the roman characters, such as Chinese, Tamil, Arabic, Korean and Japanese. To do this, 11 new TLDs (top level domains) and secondary domains representing http://example.test have been created and inserted into the DNS servers. Interestingly, as the Arabic and Hebrew languages are read left-to-right, the URL will be reversed.
Try http://例子.测试. It can actually be resolved.
You can find the plan at http://www.icann.org/topics/idn/idn-evaluation-plan-v2-9-2-14aug07.pdf