mire .htaccess:

RewriteEngine on
RewriteCond $1 !^(index\.php|audio|editor|upload|images|js|css|robots\.txt|sitemap\.xml)
RewriteRule ^(.*)$ /index.php?$1 [L]

After I attempt to browse http://wolaitiao.cn/install,it reviews 404,therefore it is no longer working properly.

Could it be since it is a VirtualHost?

<VirtualHost *:80>
...

Check apache error log

first make certain Rewrite is enabled for Apache and .htaccess files are honored for that rules.

you'll be able to simply redirect anything that doesn't physically exist to index:

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule .* index.php [QSA,L]