It’s very possible for an immigrant to believe themselves dissidents in their country of origin, but still carry over attitudes from there, and even later revert to outright loyalty to the regime there. Just look at many late Soviet emigres, who at the time were pleased to escape the USSR and live in the freedom of the West, but later often looked back nostalgically on the USSR or supported Putin’s attempts to restore it. I wouldn’t be surprised if that happens with many PRC emigres.