Updated

Germany's ambassador to China has expressed concern over the trial of veteran human rights campaigner Jiang Tianyong, saying Chinese authorities have made it impossible for him to receive a fair hearing.

Michael Clauss said in a statement Friday that China should ensure proceedings are conducted with due process and in adherence with United Nations conventions.

Clauss says Germany has raised Jiang's case in high-level meetings with Chinese officials ever since Jiang's arrest in November 2016.

Jiang was a lawyer who took on politically sensitive cases before being disbarred in 2009. He then became an activist and helped publicize the plight of lawyers arrested in a sweeping crackdown on legal activists that began in July 2015. He went on trial Tuesday on charges of incitement to subversion.