China recently carried out high-profile probes into alleged anti-competitive practices at a host of foreign companies, including European automakers Mercedes-Benz and Audi.
“The problem is the lack of transparency, which actually leaves a lot of speculation on what possibly was the intention,” Wuttke told reporters at the launch of the document.
But Wuttke told AFP earlier that the issue posed little threat to European decisions to invest in China.
“The real game-changer is where is the economy heading.
“If there is no reform in the economy in the next years then actually the economy is heading for a much slower growth pattern and that actually really has an impact on foreign investment in China,” he said.