Foreigners can apply to become Chinese citizens under article 7 of the Nationality Law of the PRC. To qualify for citizenship under that article, a foreigner must: have close relatives who are Chinese nationals; ... have other legitimate reasons for applying for citizenship.
А теперь вишенка на торте:
China does not recognize dual nationality for Chinese citizens. A Chinese citizen who acquires foreign citizenship of his own free will automatically lose Chinese citizenship
Chinese government do not recognize dual citizenship with any country, so when you become a citizen of another country, you automatically renounce your Chinese citizenship. There's no form to fill in, it just happens.
Без отказа от гражданства российского, китайского гражданства просто не будет от слова никак. А без российского гражданства в России ой как непросто. Так что, без кардинального изменения китайской конституции, ничего подобного быть не может.