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 "xn--wxtr44c"?
Here's a second example:
新浪 prompts:
xn--efvx5o
What are these codes prompted from Chinese characters?