1. Get all you can from their mind
2. Accuse them for stealing.
"Nianshuang Wang arrived in the U.S. from China about seven years ago to help explore an obscure niche in structural biology: manipulating coronavirus spike proteins to be more stable and thus better for use in vaccines.

In early 2020 it was Wang who figured out how to make the spike protein on the novel coronavirus bind with human receptors, enabling Moderna Inc. to develop its Covid-19 vaccine in record time. “I thought he’d be perfect to lead our efforts to engineer modified forms of these spikes for use in vaccines,” says Jason McLellan, the University of Texas at Austin professor whose team, including Wang, is credited with the work.

Now Wang, 34, is confronting another kind of contagion. He and his wife have been waiting three years for U.S. green cards, after then-President Donald Trump’s near-halt to legal immigration. Last summer, when the Trump administration closed China’s consulate in Houston amid news reports that the FBI was hunting suspected Chinese vaccine spies in Texas, Wang and his wife explored hiring a lawyer and even considered fleeing the U.S..

They stayed, and no FBI agents came knocking. But Wang says growing anti-Chinese sentiment is palpable, making him and other Chinese scientists increasingly afraid that they’re no longer welcome in the U.S. Several of his Chinese scientist friends have abandoned long-held dreams of pursuing careers in the U.S. and are working in the U.K. and Germany instead, he says.

“The tensions between the two countries have actually made a big difference,” Wang says. “Now the U.S. isn’t so popular among Chinese Ph.D.s.”

An explosion of hate attacks against Asian Americans in the past year has been blamed on the xenophobic rhetoric of former President Trump, particularly his racist broadsides labeling the novel coronavirus the “Chinese virus” and “kung flu.” But other U.S. leaders and institutions have helped inflame the situation, arousing particular suspicion toward people of Chinese descent. The Justice Department’s National Security Division is pursuing suspected economic spies under a heavily publicized program it calls the China Initiative, a name that casts suspicion on 1.2 billion people at a stroke. FBI Director Christopher Wray gives speeches beseeching Americans to take cover from what he calls China’s “whole-of-society” blitz to steal American know-how."

https://www.bloomberg.com/news/articles/2021-04-26/anti-asian-atmosphere-chills-chinese-scientists-working-in-u-s?srnd=businessweek-v2