Three hours later.
It was past four in the morning, and Tang Qing had already had a good sleep, his mind was unusually clear upon awakening, absent of the typical groggy feeling of just getting up.
Currently still in his excited phase, he closed his eyes and ordered the system to do another round of arbitrage transactions. Five minutes later, the system's payment notification arrived. At this point, Tang Qing noticed a pattern, transactions from Citibank to the German Commercial Bank took about five minutes, which was the longest. Transfers to the other two German bank accounts also took around four minutes each.