Can I change my nationality internationally?

A person's nationality and blood type are inherited from his parents, which is called bloodline. The emperor's son is a royal even if he sells pork! Han people can only be Han people wherever they go, and no one can change them. Even if we join other countries, the brand of the original nation cannot be removed. You see, those China people who have joined Japanese nationality are called Japanese China people, and their descendants are called Japanese China people. I'm afraid this identity can't be changed within two or three generations. However, nationalities and lineages can be diluted and mixed. If parents belong to two nationalities, you can generally choose one. After two or three generations, it has changed. In other words, both parents are Han people, and they can't change their Japanese race. At most, they can only be traitors who poke their spine. Pay attention to the word traitor, don't say traitor, but no matter how much Han people hate this traitor, they can't take the word "Han" off his head and kick out their own nation! But if this traitor finds a Japanese wife or husband, it is expected that his children and grandchildren will become Japanese!