Beijing's credibility test over Sars By Zhang Lifen BBC World Service Heads have finally rolled over the Chinese government's inaction and cover-up of the Sars virus. Sacking the health minister and mayor of Beijing may calm public anger and demonstrate the resolve of the new leadership under Hu Jintao, who took over as President in March. But the problem does not end there. The mishandling of the crisis has put China's political and administrative system in the dock. And to the surprise of many seasoned China watchers, the Chinese media has raised the previously taboo subject of political reform...