Shenzhen is 6 hours ahead of Tel Aviv
Best overlap: 8:00 AM to 12:00 PM in Tel Aviv is 2:00 PM to 6:00 PM in Shenzhen.
Schedule calls for 8:00 AM to 12:00 PM in Tel Aviv — your colleagues in Shenzhen will be online from 2:00 PM to 6:00 PM. You share roughly 4 hours a day. That's enough for regular meetings, but treat the window as prime time and guard it. These times hold for most of the year, but Tel Aviv's daylight saving (which Shenzhen doesn't use) shifts them by an hour twice annually.