@Tomáš-Mazák Or instead, you can ask for GFW exception via official channels.
Describing the issue (inaccessible from mainland China) then explaining why you believe access would be beneficial (e.g., professional meteorological use, safety, education) and ask whether there is any procedure to request review or whitelisting. English would work as well. Good luck.
CAC: nirenhua(at)cac(dot)gov(dot)cn and/or by post to the Network Management Technology Bureau address.
MIIT: KJBZ(at)miit(dot)gov(dot)cn and/or by post to the MIIT headquarters address.