Why did Xia Hong, a girl with no heartbeat, die?

Xia Hong, a girl with no heartbeat, died, but no one accepted this person and became the master to ensure safety. Xia Hong showed the meaning of his existence in his own way, and let his actions change the future. The Girl Without a Heartbeat tells the story of farewell and coexistence between human beings and creatures beyond human intelligence. Most of society is entrusted to a world managed by a humanoid robot named hIE.