Hong Kong is 5 hours ahead of Tel Aviv
Best overlap: 8:00 AM to 1:00 PM in Tel Aviv is 1:00 PM to 6:00 PM in Hong Kong.
Your shared working hours run 8:00 AM to 1:00 PM in Tel Aviv (1:00 PM to 6:00 PM in Hong Kong). You've got a decent 5-hour window. Set a recurring time near 8:00 AM in Tel Aviv (1:00 PM in Hong Kong) and stick to it. The window above shifts seasonally: Tel Aviv keeps daylight saving while Hong Kong ignores it.