朋友你好 (Hello friend) URL encoded on UTF-8 is %E6%9C%8B%E5%8F%8B%E4%BD%A0%E5%A5%BD
And \c5\f3\d3\d1\c4\e3\ba\c3 on UTF-8 is not 朋友你好
\c5\f3\d3\d1\c4\e3\ba\c3 is 朋友你好 only on EUC-CN encoding format, and I do not realize anything with that encoding.
https://en.wikipedia.org/wiki/Extended_Unix_Code
对不起