Whatever you say, according to Chinese law, they have been deprived of Chinese nationality. As traitors, they do not enjoy protection, rights and services from the Chinese government.
2)Moreover, according to Chinese law, the Chinese government does not recognize dual citizenship, and all Chinese who acquire foreign nationality automatically lose Chinese nationality. The Chinese government does not need to give any other notice.
3)Chinese nationals who acquire foreign nationality shall have their Chinese passports lapsed from the date of their acquisition of foreign nationality.