Photo taken on April 28, 2022, shows traditional Pia cakes at a production base in southern Vietnam's Soc Trang province.Photo:Xinhua

Workers make traditional Pia cakes at a production base in southern Vietnam's Soc Trang province on April 28, 2022.Photo:Xinhua

A worker processes salted egg yolks to make traditional Pia cake at a production base in southern Vietnam's Soc Trang province on April 28, 2022.Photo:Xinhua

A worker processes green bean paste to make traditional Pia cake at a production base in southern Vietnam's Soc Trang province on April 28, 2022.Photo:Xinhua