Boeing and China Aviation Suppliers Holding signed an agreement for 300 airplanes in Beijing Thursday. It was part of the US trade mission to China, and was signed by Kevin McAllister, Boeing Commercial Airplanes president and CEO, in the presence of Chinese President Xi Jinping and US President Donald Trump.

The agreement includes the purchase of 300 Boeing single-aisle and twin-aisle airplanes, which are valued at more than $37 billion at list prices.

"China is a valued customer and key partner, and we are proud that Boeing airplanes will be a part of its fleet growth for years to come. Boeing and China have a strong history of working together based on great mutual respect, and these orders build on that foundation," McAllister said.

Boeing and China have ongoing industrial cooperation on the development of technologies to reduce the aviation sector's environmental impact and enhance sustainability, and to support the safety, efficiency and capacity of China's air transport system.

In late September, Boeing and Commercial Aircraft Corp of China, the manufacturer of the home-developed large passenger jet C919, signed an agreement and unveiled Boeing's first overseas completion and delivery center in Zhoushan, Zhejiang province. The center has registered capital of $55 million.

Construction of the center, which will consist of a completion center under a joint venture between Boeing and COMAC and a delivery center owned by Boeing, got underway in early May. By the end of 2018, Boeing will deliver the first single-aisle B737 MAX plane directly from Zhoushan to a domestic airline.