The hatchling, dubbed Baby Louie, was found within a nest of dinosaur eggs.
Palaeontologists have called it Beibeilong sinensis, which translates to “Chinese baby dragon”.
They say it is the first known specimen of a gigantic bird-like dinosaur belonging to the group known as oviraptorosaurs.
Although the fossil of the infant dinosaur is small, it would have grown into an adult weighing more than 1,000kg.
The discovery of dinosaur eggs in China, South Korea, Mongolia and North America suggests Beibeilong may have been common around 100 million years ago, say the researchers.
”The geographical distribution and abundant occurrences of Macroelongatoolithusegg remains reveal that giant oviraptosaurs were relatively widespread and perhaps even common in the early part of the Late Cretaceous, even though their skeletal remains are scarce and have yet to be identified in many regions,” they write in Nature Communications.