Hello Ming and Steve,
Nathan from Trulia here. Please follow the steps below to make changes to your email address, personal information, and more:
1. Log into your Trulia account with your primary email address and password.
2. Hover your mouse indicator over your name in the top right hand corner of the page and click on "Profile" from the drop down menu that appears.
3. Some sections can be edited directly on the profile page. Click the “About” tab, hover your mouse over the section you want to edit, and click the blue “Edit” link to the right.
4. To edit email addresses, passwords, and personal info, click on the “Settings” button near the top right corner of your profile.
5. Click on the title (Email Addresses and Facebook Connect, Password, Personal Information) for each section you would like to update.
6. Be sure to save your changes at the bottom of each section when your update is complete.
If you have additional questions, please visit our help center here: https://trulia.zendesk.com/hc/en-us.