Raw oysters, frozen poultry and fresh eggs sold on mainland Chinese e-commerce platforms are still available for delivery to Hong Kong, the Post has found, despite a joint warning issued by consumer watchdogs in the city, Macau and Guangdong province.

According to checks by the Post on Wednesday, 5lbs of fresh raw shucked oysters from Chaozhou in eastern Guangdong were being sold on Pinduoduo for as low as 79 yuan (US$11), with free shipping to Hong Kong on offer.

According to shopper reviews, the oysters were delivered in vacuum-sealed containers and packed in styrofoam boxes with a few ice packs.

Frozen beef short ribs cost as little as 7 yuan per steak, while a tray of 50 fresh eggs is available for 27 yuan.

Other listings include frozen chicken breast, raw marinated seafood, frozen whole fish and frozen herring sashimi fillet.

But a check of sellers of fresh sashimi and freshly sliced beef found that some noted they could not deliver to the city when a platform user added a Hong Kong address.