Guild Wars 2

I just for a email from noreply@guildwars2.com saying this

A log-in attempt from the following location is currently awaiting your authorization.

Address: 183.2.189.121
City: Guangzhou
Region: 30
Country: CN

This location is approximated based on information provided by your Internet Service Provider. If in doubt, deny the request and try again.

If you are certain this log-in attempt was not made by you, then someone else knows your log-in credentials and you should change your password immediately via Account Management.

For security purposes, we alert you each time your account is accessed from an unrecognized location. To authenticate this log-in attempt, please click the link below:

Edited by moderator: Link removed for security reasons

Need help or have questions about your Guild Wars account? Visit our support site: http://en.support.guildwars2.com/
Thanks!
—The ArenaNet Team

On my recent log in i dont see anything suspicious, what should I do?