The deal isn’t cancelled

China instructed their Airlines not to take deliveries of any Boeing Aircraft because of the 125% Tariffs which would cause the price of the aircraft to rise up significantly

These aircraft are delivered from USA after preliminary assembly and the 125% Tariffs are applicable so that could make a $ 100 Million 787 Dreamliner worth $ $ 225 Million

Only the final assembly and interiors are carried out in Zhoushan

Likewise multiple parts from Boeing attract 125% Tariffs because they are shipped from USA

Chinas letter is clear

China has only suspended deliveries

They could’ve exempted Boeing from the 125% Tariffs but Boeings & Soybeans form a large chunk of Chinas imports from US

Plus Boeing is a large company and they might pressurize Trump into easing off the Tariff war.

One more point must be made clear. China can do without Boeing, but Boeing cannot do without China.