DaYan revolutionised speedcubing back in 2010 with the release of the DaYan GuHong, for around a year, this cube was used by essentially all top speedcubers, they released a successor in the ZhanChi and the GuHong V2 amongst other cubes which are usually considered failures and then failed to compete for many years. From 2019 onwards they have begun to release competitive speedcubes again, unfortunately they keep a very low profile on western social media so their releases are often sudden and unexpected.