On Friday, November 3rd, Air China took delivery of their first of forty-four Boeing 737MAX8 aircraft. They will be the first airline in China to operate the type. If anyone wants to track it, the registration is B-1397.
Here it is pictured, landing at Paine Field, prior to delivery.
Source: https://worldairlinenews.com/2017/11/04/air-china-takes-delivery-of-its-first-boeing-737-8-max-8/ & https://airwaysmag.com/airlines/air-china-celebrate-delivery-chinas-first-737-max-8/