Posting some lost images with some additional information gleaned from various sources over the years.
In 2010, COMAC established the Northern Research Center (北研中心), which immediately began a next generation regional airliner demonstration project. The result is the Lingque B (灵雀B) concept featuring large blended wing strakes and a V-tail.
In 2014, the North Research Center built the world's first five-sided full glass curtain immersive virtual simulation system named C-CAVE (images 4 and 5). It allows Northern Research Center to carry out VR design studies for the next generation regional airliner.
Of course, this effort by COMAC is separate from the
blended wing body concepts being studied by the the Northwestern Polytechnical University, which feature dorsally mounted engines.