Hello! According to the information you provided, this fruit is probably from the magnolia tree. Magnolia grandiflora is a deciduous tree belonging to Magnoliaceae, which is distributed in the central provinces of China, south of Beijing and the Yellow River basin. The fruit of Magnolia grandiflora is aggregate fruit with red exocarp and black endosperm. It is cylindrical, about 12 to 15 cm long and about 3.5 to 5 cm in diameter. Kelp is thick wood, brown, white lenticels and heart-shaped seeds.
Please note that the classification and identification of plants require all kinds of information and professional knowledge. The above information is for reference only. Please consult a professional plant taxonomist if necessary.