Beijing: A further tightening of regulations imposed by Chinese authorities on foreign goods purchased over the internet has reinforced fears the policy honeymoon which has richly benefited the likes of Bellamy's Organic infant formula and Blackmores vitamins has ended.

Late Thursday, China's finance ministry signalled tougher requirements in determining which goods are allowed to be imported through cross-border e-commerce warehouses in pilot free trade zones across 12 cities, which were afforded preferential tax and customs treatment.

Chinese importers of popular Australian food, dairy and healthcare brands are worried about the lack of clarity in the new regulations, but believe the changes will likely result in significantly higher logistics costs being passed on to Chinese consumers, potentially denting demand.

"A lot of the Australian brands [are] going to have problems," said Natalie Zhu, founder of Ajyaguru which operates a cross-border warehouse in Shanghai, while stressing many of the new regulatory changes had yet to be explained fully. "I personally think there will be some products, especially healthcare products, that are going to be affected."