Backers of a shuttered Chinese business weekly have launched a highly unusual challenge to the country’s media censors by filing a lawsuit against the regional government that ordered its suspension over reports critical of a major state bank.

The legal complaint filed on Wednesday in the name of a reporter for the China Business Post demands that the Inner Mongolia bureau of press and publications rescind the three month suspension order imposed on it over its reporting on alleged mishandling of loans at the Agricultural Bank of China.