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It is impossible for Fosun to export. The contract for Fosun is clearly to supply Greater China area and the rest of world is left to Pfizer.
Now China could apply diplomatic pressure to alter the contract but thats unlikely
I'm laughing at that statement
The Fosun factory making the BioNTech vaccines is located in Singapore.
Singapore and Europe both use the vaccine.
If Pfizer doesn't step up production and Fosun can supply vaccines, then the respective governments will override the BioNTech-Pfizer contract on national security grounds. BioNTech probably would be pleased.
Remember that the US government uses National Security laws - which stops US companies from fulfilling contracts to export vaccine production materials.