Chicago order entry+connecting flight, 1 hour 50 minutes enough?

Generally speaking, there is enough time.

All international flights to Chicago stop at Terminal T5 of Chicago Oder Airport. When you get off the plane, follow the crowd. Everyone has to go through the immigration formalities. There is only one way from the place where they get off the plane to the immigration hall, so follow the crowd. Go through the entry and exit formalities first, and check your passport and visa: the queue time is long (it usually takes about 30 minutes to queue here, but there are also many people and the queue time is long). 2. Pick up your luggage, take all your personal belongings, including checked baggage and personal belongings, and go through the customs (it usually takes 10-20 minutes here). Third, baggage transfer, the customs will take a road to the baggage transfer office, where there are baggage transfer counters of airlines (it is faster here). Take the airport light rail (free of charge) to the departure terminal of the next leg. Chicago Oder Airport has four terminals. United Airlines (UA) flights are at T 1 and T2, and American Airlines (AA) flights are at T3. Out of the baggage transfer station, we arrive at the international arrival lounge of Oder Airport. There is a guiding arrow on the ground. Follow this sign and get on the escalator. Airport light rail station is upstairs. Go to the corresponding terminal, check security and enter the waiting room.

In case of delay, take your passport and boarding pass (the check-in counter at China Airport will give you two boarding passes, one from China to ORD and the other from ORD to your destination) to the airline counter where you bought your ticket. They'll work it out.