Tridium and the Tianjin Institute of Software Engineering will work together on an engineering class, build an open innovation laboratory called T-Lab and form an internship base, along with collaborating on teaching and research.
Trump has said he will maintain sanctions and pressure on the North and "not repeat the mistakes of past administrations", and has said his tough stance had led to the breakthrough.
Trump also said that over 500 miles (800 km) of border wall along the nation's southern border will be "fully completed by early next year".
Trump, announcing Mattis' departure on Twitter, said he would nominate a successor soon.
Trump has agreed to activate the National Guard in three states --California, New York and Washington -- which are hit the hardest by the spread of COVID-19. California National Guard is being deployed at the request of Newsom to assist food banks due to the shortage of volunteers.
Trump and First Lady Melania were welcomed at the Imperial Palace in Tokyo by Emperor Naruhito and Empress Masako.
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Trump responded Tuesday with a series of tweets that reiterated his attacks on his predecessor and Biden, Obama's vice-president.
Trump told Fox News on the weekend that Deputy Attorney General Jeff Rosen, whom he labeled "an outstanding person", will become acting attorney general.
Trump in February also suggested he was open to the trade pact during a news conference with Australian Prime Minister Malcolm Turnbull.
Trump and First Lady Melania were welcomed at the Imperial Palace in Tokyo by Emperor Naruhito and Empress Masako.