A local court found Qi Jingyu convicted of robbing a tomb in the protected Hongshan Culture site in Lingyuan city twice in June 2013 using a spade, pick and metal detector. He had found three jade items.
In October, he robbed another tomb, unearthing three jade bracelets and a jade hoop, state-run Xinhua news agency reported.
The cultural relics protection center of Liaoning found that the two tombs were more than 5,000 years old, and the theft resulted in serious damage and loss of archaeological information.
Qi, who was sentenced along with three accomplices, was also find 40,000 yuan (USD 5,826).