I’m surprised/impressed by the quick turnaround between the original LK99 paper submitted on 22 Jul 2023 and this reproduction attempt submitted on 31 Jul 2023.

I’m surprised/impressed by the quick turnaround between the original LK99 paper submitted on 22 Jul 2023 and this reproduction attempt submitted on 31 Jul 2023. Could there have been a pre-print of the original paper that allowed the reproduction attempt to begin earlier?