It may be useful to look at the rules that apply in Taiwan (taken from the article Hokwongwei linked to):
According to Article 19 of the Nationality Law (or whatever the official name may be) citizenship obtained by naturalization may be taken away up to 5 years after obtaining it if
- the immigrant does not fulfill the “good conduct and no criminal record” conditions
- the immigrant does not reside at least 183 in the country days each year
- the immigrant does not obey the laws of Taiwan
- the immigrant is not able to support him/herself
- the immigrant does not possess basic language skills and basic knowledge of citizen’s rights and obligations
IANAL, but it looks like citizenship obtained by naturalisation in Taiwan is provisional for the first 5 years. Since i had previously mentioned Canada and Germany, i looked up the relevant information related to those countries. You will see that the time frame and the rules are basically comparable to those in Canada - see justlanded.com/english/Germ … itizenship. The big difference is that Canada and Germany don’t grant citizenship (and with that a passport) on a provisional basis but instead give immigrants the right to permanent residence, which may be transformed into citizenship after the required time has elapsed and there are no other obstacles (this process is not automatic; it requires a second application process).
Since immigrants to Canada or Germany must have a valid passport up to the time they receive their new citizenship, they cannot and must not give up their original citizenship before that. Consequently, in Canada and Germany, unlike in Taiwan, people do not end up stateless if their permanent residence rights are revoked.