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In March, the temperature in Four-nine City was still a little low at night, and the sanatorium was built in the suburbs, where it was 2 or 3 degrees colder than in the city. Jiang Yining pushed open the cold iron door leading to the rooftop. Before she could step out, she felt the frigid wind rush at her face. She instinctively turned her head aside to avoid the gust, then stepped forward again
