Go to www.yangfamilytaichi.com,
on the left side of the screen you'll see a link to Tai Chi Info, click on that, that'll take you to a new page with some expanded links under the Tai Chi Info link (which is still in the same place on the new page), choose the Teacher Database link, that will open a new window.
Now, in that window you have two choices for the States. One is United States, one is USA. Choose USA, as there are more links on that page (55 vs. 3). Look down the list that will pop open and find Apex, NC.
There you go.
Glad I could help.