Chinese characters to "xn--[....]"? DNS? Sometimes when you directly search some Chinese in certain Chrome browsers you will get something like the following prompt:



Here searching 百度 asks:

Did you mean to go to http://xn--wxtr44c/

What correlation is there between 百度 and &quot;xn--wxtr44c&quot;?
Here's a second example:



新浪 prompts:

xn--efvx5o

What are these codes prompted from Chinese characters?
It's Punycode, used in URLs to encode Unicode as ASCII.
https://en.wikipedia.org/wiki/Punycode