Ahead of the 2008 Games, Tibetan filmmaker Dhondup Wangchen released a documentary with regime-critical voices - and paid a high price.

- They arrested me on the street without any legal basis.

They chained me and put a sack over my head then they put me on a wooden chair.

For seven days and eight nights I was not allowed to eat or sleep.

Then I was imprisoned for six years and three months, Wangchen tells SVT Sport.

On tour for boycott

He fled to the USA and is now making a European tour, stopping in Stockholm, to make the outside world react to China.

Presence in Beijing, albeit with critical eyes, he thinks only strengthens the regime.

Boycott is the strongest weapon, says Wangchen:

- It is obvious that China feels a certain discomfort, of course.

Individual athletes in the free world can not choose not to participate in the Olympics.

Now that several countries are not sending their official representatives to the Olympics, it is palpable for China.

China is trying to ensure that more countries do not join the boycott.

Cooperation for human rights

Wangchen has met several national Olympic groups during his trip - and pays tribute to Sweden's Olympic Committee.

- Sweden has expressed its support for us.

They support our struggle and show solidarity with us.

They said that together we should work with different organizations to change and improve human rights in China.

You can watch the entire feature with the Tibetan documentary filmmaker Dhondup Wangchen in Tuesday's Sportnytt on SVT Play.