Upgraded Means

"...you mean aliens have invaded our world, and that they're masquerading as humans by secretly replacing our friends and relatives with themselves? And, our relatives and friends may no longer be the people we know?" Bai Qing's eyes widened. Although she said she would believe everything Zhang Heng said, as an ordinary person with a respectable IQ, common sense, and nine years of compulsory education, she found it really hard to believe upon hearing it for the first time.