There are various visa types for travel to Tibet, for foreign visitors of China orginal but holding a China Q2 visa, we need your China family invitor to provide an invitation letter to prove you are their family members.  See sample below: 

Visa Type: Q2  

Purpose of visit: China Family Visit for visitors of Chinese origin. 

Required documents:   

>> Passport copy

>> Visa copy 

>> A document from your Chinese family member, it must be in Chinese and with invitor's Chinese ID card copies.