The poster made no mention of whether this person still retained Chinese citizenship, but this is crucial. If the person did indeed retain Chinese citizenship, then I can only say, somewhat unkindly, that he got what he wanted! It's common to see "shrewd" Chinese people who have acquired foreign citizenship boasting about holding two passports simultaneously, switching between them at opportune moments to "maximize their benefits." I deeply despise such people who lack loyalty and a sense of belonging, and who only seek personal gain. Their cunning has backfired, ruining a family's life for ten years.
@SUIFENGfreedom That's fake. To become a Japanese naturalized citizen, you need to apply to the Chinese embassy to renounce your Chinese citizenship. Only with the renunciation certificate can you go to the legal department to finally process your Japanese citizenship application. Japan doesn't allow dual citizenship either, so there's no way to exploit this loophole.