Which preposition to use with tibet

in Occurrences 2%

Here the railway crosses the route of Gabriel Bonvalot and Prince Henri of Orleans across Tibet in 1889-90, a much more complete journey than ours, a circular trip from Paris to Paris, by Berlin, Petersburg, Moscow, Nijni, Perm, Tobolsk, Omsk, Semipalatinsk, Kouldja, Tcharkalyk, Batong, Yunnan, Hanoi, Saigon, Singapore, Ceylon, Aden, Suez, Marseilles, the tour of Asia, and the tour of Europe.

to Occurrences 2%

I hunted himfor months, from the borders of Tibet to the borders of Russia.

from Occurrences 1%

The British demanded the complete separation of Tibet from China, but the Chinese rejected this (1912); the rejection was supported by a boycott of British goods.

Which preposition to use with  tibet