It's certainly preemptive measure. But not sure what the purpose it serves.
This was pre-payment or down payment for future scanner purchase. Any future US sanction on immersion scanners would certainly trump any down payment or an existing PO. SMIC had an outstanding EUV PO with ASML and also down payment, but they still weren't able to take delivery of the EUV system.
So not sure why it would be different this time around with the immersion systems. If US could coerce the Dutch government to block shipment of immersion scanner, even the $1.6B pre-payment will not guarantee SMIC could get ASML to honor the immersion POs.
I'm sure the $1.6B serves some purpose, I just personally don't quite understand what that purpose is.
Because at the moment ASML can still ship DUV do China,and the Dutch is not responding to US call to halt DUV export to China as of now. Plus the lead time for DUV is shorter than EUV.
So SMIC is seizing this moment,betting that they will be able to receive the machine before they cannot.