Mr Williams' case has similarities to a fight waged by other military veterans over their pensions.
The supervisor didn't say it outright, but Chen got the message: "Employees should have local degrees. People like me (with overseas degrees) won't even get a response."He later realised that "there really weren't any colleagues with overseas undergraduate background in the department".
He went back to the US and did his master's at Johns Hopkins University, and now works at Chinese tech giant Baidu.But despite the degree from a prestigious American university, Mr Chen does not feel he has an edge because of the stiff competition from graduates in China.What also has not helped is the suspicion around foreign graduates. Beijing has ramped up warnings of foreign spies, telling civilians to be on the lookout for suspicious figures.
In April, prominent Chinese businesswoman Dong Mingzhu told shareholders in a closed-door meeting that her company, home appliance maker Gree Electric, will "never" recruit Chinese people educated overseas "because among them are spies"."I don't know who is and who isn't," Ms Dong said, in comments that were leaked and went viral online.
Days later, the CIA released promotional videos encouraging Chinese officials dissatisfied with the government to become spies and provide classified information. "Your destiny is in your own hands," the video said.
The suspicion of foreigners as the US and China pull further away from each other is a surprising turn for many Chinese people who remember growing up in a very different country.Colyn and other members of Olive Gordon's family visited Lockerbie in the days after the disaster. It was a shocking scene.
"I remember the crater, this huge hole, and these little bits all over the place. It just had this smell. My God, my sister was found here. Somewhere here," he says.In the weeks that followed, members of the local community came together to wash, press and package up the belongings of those who had died on the plane.
The Lockerbie laundry has become a symbol of the kindness shown by the people of the town. They treated the dead and their families with love and care while coping with their own immeasurable trauma.Colyn says: "Just thinking about it now makes me emotional. Because these people, they don't know you, they've never met you. But the way they treated you is as if they were family.