Should the USA stop accepting college students from Mainland China?

I think the US needs to expand the coverage of our way of life, not to limit the amount of people exposed to our way of life. These students are not the big problem, it is the US busnese and companies. Greed runs and controls these operations and for a sum they will sell anything they can get their hands on to any person. They like to place fronts over these people who they know should not own these items so in their own way they are clean and above board. All of this in the name of profits, this makes them feel like the golden boys who help the needy. The J-20 was all American technology bought from Bosnia from a downed F-117 in 1998 I think it was. Bosnia sold parts of this craft to Russia and parts to China and these two nations built a spin off of the F-117 of the 1990's. The Bosnian government put the remainder of this aircraft on display in their country. China bought a wing, radio headset, part of the canopy and a few other parts. The F-117 was not a true stealth aircraft but it was the first generation of a new design. Now 13 years later China has flown a aircraft of the first generation stealth fighter. This is a very good airframe to be used against the small nations in Asia and to use as a intimidation tool. Would this work in a act of hostilities with a major power? You must decide this, this aircraft is the technology that is being phased out and the powers who are phasing this aircraft out know and understand all the limitations of this technology. Would you want to ride in a aircraft, putting your life on the line, if it was a Chinese knock off of the First Generation Fighter and you were going to be fighting the nation who developed this but were now flying the Fifth Generation Fighter? I would stick with the small Asian nations that I could scare or over power.