The issue is dual citizenship. That is, holding citizenships from two countries at the same time. There is only person that is right here, and that is me. Because it is the Chinese law: no dual citizenship.
I want to make it absolutely clear. There should be no muddy water here. By the way, I have long advocated that China should allow dual citizenship, or at least in the model of NRI (Non-Resident Indian). The current no-dual-citizenship law is too rigid and no longer in China's best interest. An interesting but separate topic.