Tibetans can’t get out of Tibet unless they’re spotlessly pro-Beijing:

“China’s border controls not only exist to keep ‘harmful’ individuals out, but also to keep them in. Particularly if Beijing considers said individual to be more harmful to it than to the outside world.

While not unique, this esoteric approach to border controls can be a trial in itself, as Tibetan writer Woeser (sometimes referred to as Woeser La), knows all to well. She wishes to leave, but Beijing won’t let her.”