Over the last two months, Chinese citizens have had to adjust to a new level of government intrusion. Getting into one's apartment compound or workplace requires scanning a QR code, writing down one's name and ID number, temperature and recent travel history. Telecom operators track people's movements while social media platforms like WeChat and Weibo have hotlines for people to report others who may be sick. Some cities are offering people rewards for informing on sick neighbours. Chinese companies are meanwhile rolling out facial recognition technology that can detect elevated temperatures in a crowd or flag citizens not wearing a face mask. A range of apps use the personal health information of citizens to alert others of their proximity to infected patients. Experts say the virus ... has given authorities a pretext for accelerating the mass collection of personal data to track citizens. It's mission creep," said Maya Wang, senior China researcher for Human Rights Watch. According to Wang, the virus is likely to be a catalyst for a further expansion of the surveillance regime. Citizens are particularly critical of a system called Health Code, which users can sign up for through Alipay or WeChat, that assigns individuals one of three colour codes based on their travel history, time spent in outbreak hotspots and exposure to potential carriers of the virus. The software, used in more than 100 cities, will soon allow people to check the colours of other residents when their ID numbers are entered.