Boeing will sell 300 planes worth $37 billion (£28.2 billion) at list prices to state-run China Aviation Supplies Holding Company, under a deal signed today - just one of several agreements announced during U.S. President Donald Trump's state visit to Beijing.
It includes both orders and commitments for 300 Boeing single-aisle and twin-aisle aircraft, made up of planes from the 737, 787 and 777 families. The breakdown between firm orders and non-binding commitments was not immediately available.
"China is a valued customer and key partner, and we're proud that Boeing airplanes will be a part of its fleet growth for years to come", said McAllister.
Analysts said, however, that some of the orders may be among the more than 300 from undisclosed buyers posted this year and that it was not yet understood how much of the China deal would be entirely new business.
This past July, the company announced it agreed to purchase 140 Airbus aircraft in a deal that had list prices that totaled $23 billion. Boeing had 323 orders by unidentified customers as of November 7, of which 282 were for its 737 narrow body family.
Boeing says one out of every four jetliners now rolling off its assembly lines is being delivered to Chinese customers, suggesting Chinese demand is strong, despite vagueness about how many actual Chinese orders it has won.
Chinese state television also reported that US planemaker Boeing had signed $37 billion in commercial deals in China as part of Trump's visit.
The C919 is due to make its first long-distance test flight this Friday, according to Commercial Aircraft Corporation of China (COMAC), the Shanghai-based manufacturer of the jet.
The new order is for 40 Boeing 777s and 787s, and 260 737s.
China Aviation Supplies played prominent roles in deals that were announced during the exchanges of previous governments.