Shenzhen is 18 hours ahead of Honolulu
Best overlap: 2:00 PM to 6:00 PM in Honolulu is 8:00 AM to 12:00 PM in Shenzhen.
Plan around 2:00 PM to 6:00 PM in Honolulu, which is 8:00 AM to 12:00 PM in Shenzhen, to catch everyone during office hours. Since Shenzhen is 18 hours ahead of Honolulu, the workdays overlap by around 4 hours; 2:00 PM in Honolulu (8:00 AM in Shenzhen) makes a reliable recurring slot. Mind the calendar: when you pick a time, Shenzhen will be on the next day compared with Honolulu.