Heartbeat SUBWAY

In cities with full coverage of the "Heart Rate Metro" system, everyone's real-time heart rate will be displayed overhead in the form of a soft halo. As a result, this super city has established a unique set of social etiquette: love has become an open data game, and marriage counselors have become "emotional data analysts." Until one day, the central display screen of the subway system suddenly malfunctioned, and everyone's heartbeats resonated at the same frequency in the crowded carriages during the evening rush hour.