Remember when Putin announced in 2018 they had hypersonic nuclear missiles. Only to find out last year that they are still working on said missiles and one exploded creating a radioactive cloud floating over Europe. China is a bit of a mess when it comes to announcing advancements before the west. China's J-20 fighter is supposedly as good or better than our F22's. They are based on stolen technology from the US. They are so great that most of them are officially grounded because of technical issues. They have also figured out the hyperloop before anyone... and rail guns... there is a much longer list. But I just don't believe any of it. Its nothing more than them claiming they are better than us.