Ottawa is 13 hours behind Shanghai
There is no standard 8-to-6 overlap. Someone joins early or late.
When Shanghai starts work, Ottawa is already winding down or offline — the 13-hour gap leaves no shared window. Default to async and only schedule live time when it genuinely needs a conversation — then make it count. Don't be caught out by clock changes — Ottawa observes daylight saving and Shanghai doesn't, so the offset varies by an hour through the year.