What happened to China's arrested rights lawyers?

Human Rights Day is observed every year on 10 December

But in China, it's proving a sensitive anniversary as experts from the UN demand answers from the government about the recent disappearance of a well-known human rights lawyer.

Jiang Tianyong went missing three weeks ago after attempting to investigate the detention of a colleague.

Human rights groups fear that Mr Jiang himself may now have been detained.

Our China editor Carrie Gracie has this update on Beijing's sweeping crackdown on its human rights lawyers.

Illustrations by Badiucao