2. In addition to playing a key role in identifying fugitives, there is also a particularly meaningful application direction, which can identify lost children and the elderly and find relatives for them. Public Security cloud mirror is a high-tech wearable product, supported by Zhejiang Public Security Big Data and using advanced AR technology, which is specially tailored for law enforcement duty and convenience service. As long as the police on duty wear "cloud mirror", they can quickly judge the residents within their jurisdiction.