Smartphones: Smartphones play an important role in limiting exposure. Contactless delivery is provided via delivery apps, in which vehicles drop off food at a given location, along with a card indicating the temperature of everyone engaged in creating and delivering the meal. Another service provides users with maps that depict residential neighborhoods with verified instances and their closeness to them. Meanwhile, mobile payment apps are reducing the spread of viruses through paper money, which can carry viruses for up to 17 days. With the world's highest e-wallet penetration and two of the world's largest mobile payment systems, Chinese fin-tech is assisting in slowing the spread of the coronavirus.