Question about centos5.5 Chinese support ???

Question about centos5.5 Chinese support ??? -- Linux general technology-Linux technology and application information. For details, refer to the following section. My system is centos 5.5. The default system language is English. But because my younger brother wants to build a website, he needs to change the system language to Chinese. The operations I have tried before posting are as follows:
The content of the/etc/sysconfig/i18n file is as follows:
LANG = "zh_CN.GB18030"
LANGUAGE = "zh_CN.GB18030: zh_CN.GB2312: zh_CN"
SUPPORTED = "zh_CN.UTF-8: zh_CN: zh: en_US.UTF-8: en_US: en"
SYSFONT = "lat0-sun16"
The software packages for installation include:
Fonts-chinese
Fonts-ISO8859
After the restart, a Chinese Garbled text is displayed. the locale command displays the following content:
LANG = "en_US"
LC_CTYPE = "en_US"
... = "En_US"
..............
LC_ALL =
This content
This is not clear. It seems that the settings in the i18n file have not been read and take effect .....
But the younger brother I use the LANG = "zh_CN.UTF-8" command to temporarily convert to Chinese, and then use the locale command to display the following content:
LANG = "zh_CN.UTF-8"
LC_CTYPE = "zh_CN.UTF-8"
... = "Zh_CN.UTF-8"
..............
LC_ALL =
Chinese characters in these operating systems are still garbled !!!

Give me some advice
Thank you!