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Mesabi Trust operates as a royalty trust in the United States. The company is involved in the conservation and protection of the assets held. The company's principally wholly-owned segment is the iron ore mining segment and it generates income from the Peter Mitchell Mine, an iron mine located near Babbitt, Minnesota, at the eastern end of the Mesabi Iron Range.
Zhihu Inc is predominantly engaged in the operation of one online content community and monetizes through paid membership services, advertising services, content-commerce solutions services, and vocational training in China. It generates revenues from Advertising services, Paid membership services, Content-commerce solutions, and Others. It derives all its revenues within China.