In the city of Zhoushan, where workers seated the interior for 737 years built in Seattle for sale on the Chinese market, the 100-acre site of Zhoushan is part of the plan of an American aviation company to strengthen ties to what will soon be the world's largest aviation market.
The first 737, which had to be carried out at the factory, were sent to China's airline Air China on Saturday.
"This is an important milestone in Boeing's efforts to deepen its footprint in China, as well as to support the growth of the Chinese aviation industry, opening up a period of cooperation," said Zhao Yuerang, president of COMAC.
The critics of the new Boeing facility say that we are tackling the work done by US workers abroad and giving China a valuable insight into the production of the jetliner.
Expanding its presence in China is crucial for Boeing to remain competitive with Europe's competitive Airbus.
Boeing estimates that in the next 20 years, China will need 7,680 new aircraft worth $ 1.2 trillion, plus a commercial service of $ 1.5 trillion to support new fleets.
Trump also went to American companies to build factories abroad.
"In China, we can increase the volume and increase sales, as increasing sales in China are increasing construction aircraft in the US, which are American manufacturing companies," he said.