Only those who can make valuable contributions. There are Chinese people who are US citizens working on US military projects, cutting edge bioscience, AI, etc... If they are the type that is innovative and desired by China, they should be patriotically obligated to return.
But that is not most people. If a Chinese person is in the US fixing cars, installing drywall, cooking up at the local Chinese buffet, they are just doing their best to live good lives without doing harm to anyone. This goes even beyond that. There are doctors, engineers, code monkeys whom China does not want because China is saturated with skilled workers, and they would only be competing with other Chinese in China who are equally qualified for the same work positions. Even though they are strong in their careers and highly capable, if they are not innovating at the highest level of technology, they are still linear workers; 1 guy does X work, 10 guys do 10X work. China needs innovators who are force multipliers; put one into action and his innovations make all of society's efforts more fruitful. Sadly, sometimes there are highly educated linear workers who are outcompeted in China and end up doing food delivery; in this case, I can even recommend they emigrate to find a proper position to keep their skills sharp, with the caveat that if they blossom into force multipliers, they return to a proper position offered to them in China.
When a Chinese person abroad becomes a shining gem in his field and can drive at the pioneering edge, when they become innovative force multipliers, they need to consider who they are genetically and politically, and if they arrive at the wrong answer, then they are indeed traitors/hanjian.
I never fret about passports and documents. They are just paper, mostly made for convenience. As long as their contributes are to China and their hearts are in the right place, that is all I ask.
