All rapid Antigen kits produced by the Chinese company are problematic.
All countries that have tried have similar complaints. I hope that China had not used it on their patients. As far as we know, there is no problem with other types of test kits sold by China, for now. Many Chinese companies working in the medical fields want to use the results of this epidemic and quickly turn it into profit realization. Export products have to comply with many standards, especially when entering the EU region. But as far as we can see, even some Chinese-produced masks (which is one of the simplest needs) are fake, no protection feature. The Netherlands has collected back them from the market. There are such problems as maybe regulations are weak there, and on the other side Europe's urgent needs (local production does not meet the need).
But ,this opportunity window will not be open for a long time. All countries are implementing emergency policies. In a few months, the situation will not be in favor of China.
