Dear Faye,
Thank you for taking the time to dispute the information provided by "Jack" about your training school.
Names used on internet forums are routinely modified to protect the identity of the people posting; there is no way to determine whether "Jack" was actually one of your employees.
Attaching that photo of the actual names of your employees on the internet places them at risk.
A quick question if I might about your employees Mr. Meza and Ms. Guerra: are they citizens of a native English speaking country, as required by Chinese law to teach English, or does your school offer lessons in Spanish and/or Portuguese? Perhaps the Xian Immigration Police department has additional questions for you about the their visa status.