Hong Kong is 7 hours ahead of Berlin (winter) or 6 hours ahead (summer). When it's 10:00 AM in Berlin, it's 5:00 PM in Hong Kong. Hong Kong does not observe DST.
Berlin uses CET/CEST while Hong Kong uses HKT (Hong Kong Time).
Optimal window: 8:00 AM - 11:00 AM Berlin time (3:00 PM - 6:00 PM Hong Kong). Early morning calls from Berlin reach afternoon business hours in Hong Kong.
Hong Kong is a major financial hub with significant German banking and trading presence.