For Li Wan, a 25-year-old living alone in East China's Shandong province, the blunt question "Are you dead?" wasn't an insult, but rather an 8-yuan ($1.14) investment in peace of mind. 對於25歲的李婉（音譯）來說，這位獨自生活在中國東部山東省的年輕人，面對“你死了嗎？”這樣直白的問題，並非感到被冒犯，反而視作一項8元（約合1.14美元）的安心投資。 Li is one of thousands of young professionals driving a viral surge for "Sileme" — translated as "Are You Dead?" — a minimalist safety app that has recently dominated the paid charts on China's Apple App Store. The app, branded as Demumu in its English version, requires no login or personal data; users simply tap a "check in today" button once a day. If they miss their check-in for consecutive days, the system automatically emails a designated emergency contact. 李婉（音譯）是數千名推動“Sileme”（意為“死了嗎”）病毒式傳播的年輕專業人士之一。這款極簡安全應用近期在中國蘋果應用商店的付費榜單上獨占鼇頭。這款英文版名為Demumu的應用無需登錄或提供...