Can mainland students become Hong Kong citizens after attending universities in Hong Kong?

Yes, you can. According to the query of Hong Kong's hukou conditions, Hong Kong implements a 4+3 preferential policy for mainland students. As long as you study in Hong Kong for four years and work continuously for three years, you will have the opportunity to obtain a Hong Kong resident identity card, and more than 0/00 countries around the world will be exempted from visas. Hong Kong citizenship refers to the regional household registration of China Special Administrative Region. Due to historical reasons, it was forcibly separated in its early years and implemented one country, two systems after the reunification.