Over 20 kg of Chinese coins made in the 8th or 9th century in China's Tang dynasty have been found incentral Vietnam, local newspaper Saigon Liberation reported Friday.

A local farmer named Nguyen Duc Dung on Thursday dug out a jar containing the copper coins in a rice field in Quang Ninh district,Quang Binh province. One side of the coins has four Chinese characters , and the other side is plain.

  

The coins are rare and valuable, said Tran Anh Tuan, director of the Quang Binh Museum, noting that the coins appeared in Vietnam when the Tang dynasty prospered most.