I am a "Greedy Algorithm" team member responsible for serverless architecture building via AWS cloud (Lambda function + API Gateway). I utilize AWS services to develop website functions such as the Chatbot (Lex), FaceID check-in (Rekognition, DynamoDB), and also host the website (CloudFront, S3). The website frontend connects to the backend part and handles face-mask detection and social distance detection.The Hackathon event is to be hosted by the City University of Hong Kong and sponsored by AWS, Huawei, SenseTime, Siemens, and Sengital. This event is welcome to all local university students.