Can China sue American citizens?

1. Because the defendant had been prosecuted at that time, there was no statute of limitations for prosecution. No matter how many years or seven years, as long as he was in China, he would be prosecuted.

2. "Accused of economic fraud (criminal) in China and becoming an American citizen (immigrant) seven years later, can I be sued by China? Does China have the right to detain it when it transits back to China? " ：

(1) If he is in the United States, China judicial organs have no right to go to the United States to arrest him.

(2) If he is in China, China will have criminal jurisdiction over him; He can be detained and prosecuted for trial. Because: ordinary foreigners have no judicial immunity in another country, only diplomats enjoy criminal and partial civil immunity.

3. "So I was detained. Is it useful to ask the American embassy for help? " To a certain extent, the American embassy can ask for a fair trial for him and hire a lawyer for him, that's all.