My site go offline after I change the password of my web hosting pasword. What should I do?

Once you change the password in our web hosting control panel. The database password will also be changed.

Then, please visit your file manager or FTP to change the following value.

You may change the password in /home/xxx/public_html/sites/default/settings.php

$db_url = 'mysqli://user_name:new_password_here@localhost/database_name';