I want to know the answer to the following question:
Who was the  vice royalty of the Sakya regime established by?
All the background I'm provided with is that "He adds that "Although agreements were made between Tibetan leaders and Mongol khans, Ming and Qing emperors, it was the Republic of China and its Communist successors that assumed the former imperial tributaries and subject states as integral parts of the Chinese nation-state."". Is that enough to answer the question?
Answer: no