A top university in Beijing is using a facial recognition system to verify the identity of students and staff entering its campus.Often op universities in China restrict – and even ban – members of the public from visiting their campuses, and students and staff are often required to produce proof of identity before they can enter.Facial recognition systems are fast becoming part of life in China thanks to its huge population and centralised identity databases, and the government is keen to support the technology as part of its ambition to become a world leader in artificial intelligence.The technology is used in areas such as financial services, transport and retail as well as public security, where police use it to catch criminal suspects and even to name and shame jaywalkers.But its use for state surveillance – including the tens of thousands of facial recognition cameras being used to track the Muslim Uygur minority in Xinjiang – has caused alarm and drawn strong criticism from human rights activists.Peking University built its facial recognition system on the university ID photos of its students and staff, according to a post on its website.According to the university's computing center, this is actually not the first application of facial recognition at the university. To ensure class attendance, the university has been using facial recognition technology as the register.However, different from the indoor application, the outdoor facial recognition technology needs to react to changes in light, and it also different to the standard one-on-one recognition tech. Instead, it searches through hundreds of thousands of photos in its database to find the one that matches the scanned face.Other universities are also using facial recognition systems.Half an hour's drive away, Beijing Normal University has installed facial recognition cameras outside its student dorms. Students must have their faces scanned and shout out their names if they want to go into the building, The Beijing News reported earlier.In order to accommodate students with accents from across the country, the system can recognise 26 different Chinese dialects, the report said.