Germany on Saturday discouraged non-essential trips to China, the world's most populous nation, which is struggling with a surge in Covid cases after relaxing strict virus restrictions.
"We currently discourage non-essential trips to China. The reason is a peak in Covid infections and an overwhelmed health system," the German foreign ministry said on Twitter.
More than a dozen countries have slapped fresh travel regulations on travellers from China.
Chinese authorities have said in recent days that the first wave of infections has hit a peak in cities including Beijing and Tianjin.