>>analyt+(OP)
They don't immediately make articles about them no. However, they don't work alone - if you read articles from the WIV on the matter every single one of them is made in collaboration with international researchers, which would have had access to notebooks and private databases.
4-6 weeks is lower than what we've seen abroad - in Italy between the likely patient zero in September 2019 and the first official case in late february, 5 months had gone.