Does my girlfriend needs to go to Houston or she can send it ?

Hey,
my girlfriend has a Venezuelan passport and lives in Florida with a student visa.
She wants to apply for a tourist Chinese L to come to visit me.
I know that she needs to go to Houston to get the L. However does she need to go herself to give her passport and other document or she can send it by fedex and just go there to take it back ?
Thanks for your answer.