The matter and energy in the universe have reached a critical threshold. The universe is collapsing across tens of billions of light-years, and with its death imminent, the Return Movement has begun! The Returners are making one final effort, broadcasting to countless civilizations that originated within the universe. In more than a million recorded languages, they warn the many civilizations to return the matter they took from the greater universe. The Returners don't expect every civilization to comply, despite their desperate final efforts. Cheng Xin and Guan Yifan, the only humans known to humanity, resolutely chose to return the matter of Universe 647. Perhaps Cheng Xin has already made too many wrong choices. This time, she doesn't want to make another one.
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