Shanghai is 14 hours ahead of Chicago (CST) or 13 hours ahead (CDT). When it's 7:00 AM in Chicago, it's 9:00 PM in Shanghai. China does not observe DST.
Chicago uses CT (Central Time) while Shanghai uses CST (China Standard Time).
Optimal window: 6:00 PM - 9:00 PM Chicago time (8:00 AM - 11:00 AM Shanghai next day). Evening calls from Chicago reach morning business hours in Shanghai.
Chicago's trading and manufacturing sectors have extensive partnerships with Shanghai.