I am traveling to China for a few days, I understand I need a Visa so I will send my documents with a courier to China Embassy in Mexico, can you help me in some issues?.

The Courier ask for one contact person for get the documents, when the embassy give visa, what is the name of this person?,

can I send US Dollars for pay the Visa or only Pesos Mexicanos?

Thank you for your answer
O. Cruz