The following instructions are for namecheap.com but should be roughly the same for other registrars.
Login & manage
Sign in to your Namecheap account (Sign In option is available at the top of the page).
Select Domain List from the left side menu and click on Manage button next to your domain:
Navigate to the Advanced DNS tab at the top of the page:
Add A record
In the Host records section (first section), click "Add New Record" button:
Select A Record for Type, enter @ as the Host, COPY & PASTE 220.127.116.11 into Value, and click the check mark to save:
Delete previous records
Delete any other host records by clicking the trash can icon - do not perform this step if you are using your do main to point to anything else, or are using a custom email address (email@example.com):