Equivalent of php's chr in golang

i am try to change a fuction from php to golang . the function job is use chr,ord,base4_encode to encode some string。php generate a serial int number, like 122|234|135|138|179|19|190|183|80|156|4|159|195|213|86|241|140|7|112|23|61|182|37|91|185|26|203|185|206|206|183,
some number biger than 127,the ascii bigest number is 127.
now, the probrem is:
php's chr(206) is not equivalent golang's string(rune(206))

please help me,thx

The results in PHP and Go are different because, as the documentation for each states, PHP's chr returns the ASCII character for its argument, whereas Go's rune uses UTF-8. Below 127, ASCII and UTF-8 are the same, but above that, they differ.