The government's pledge to reduce its influence over operational matters in China's manufacturing sector follows an apparent toning down of its high-tech industrial push, which has long annoyed the United States.
"This issue is bigger than just China. It is about demonstrating to strongmen globally that the world will hold them accountable for their actions," the lawmakers wrote in a letter to US Secretary of State Mike Pompeo.
Trump imposed import tariffs on hundreds of billions of dollars of Chinese goods last year and has threatened more to pressure Beijing to change its practices on issues ranging from industrial subsidies to intellectual property to hacking.
The bomb was airdropped by an H-6K bomber and caused a gigantic explosion, showed a promotional video released by China North Industries Group Corporation Limited (NORINCO) on its website at the end of December.
Presidents or prime ministers from 18 countries are traveling to Shanghai for the event, ranging from Russia and Pakistan to the Cook Islands, though none from major Western nations. Government ministers from several other countries are also coming.
In a letter to the Director of National Intelligence, Daniel Coats, the senators -- Ron Wyden, Martin Heinrich and Kamala Harris -- asked whether the US intelligence supports Trump's claims that China interfered in the 2016 presidential elections.