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[Era + system + access to all worlds + business + short-term parents] Lu Qingdai took care of her children all her life, but she died alone in a rented house. When she opened her eyes again, she was back in the 1980s and bound to the filial son and virtuous grandson system. Unfilial children? The filial son and virtuous grandson system sent them to the world to transform. During the day, they receive education in the era, and at night, they survive in the extreme world of another world. By accident, Lu Qingdai trained five top talents for the motherland...