For the mailbox name.

It represents the corner case of the China mandatory char set standard requirement.

If you want to test the surrogate pair support capability of the mail system,  using this string 𠀀𠀁𪛕𪛖.

Regards.

Yi Fan

From: Don Hollander [mailto:don.hollander@icann.org]
Sent: 2018年1月17日 13:47
To: Mark Svancarek <marksv@microsoft.com>; ua-eai@icann.org
Cc: Yi Fan (CELA) <yifan@microsoft.com>
Subject: Re: [UA-EAI] Regarding Chinese EAI test addresses

Where in the address?  Mailbox name or domain name?

D

From: UA-EAI <ua-eai-bounces@icann.org> on behalf of Mark Svancarek via UA-EAI <ua-eai@icann.org>
Reply-To: Mark Svancarek <marksv@microsoft.com>
Date: Wednesday, 17 January 2018 at 1:01 PM
To: "ua-eai@icann.org" <ua-eai@icann.org>
Cc: "Yi Fan (CELA)" <yifan@microsoft.com>
Subject: [UA-EAI] Regarding Chinese EAI test addresses

Yi fan has suggested that we should be using this string in our test addresses:

㐀㐁䶴䶵

because it exercises all of the Chinese Unicode pages and can catch edge cases on various platforms.

Something to keep in mind as we do testing.