sentence1: The lucrative tin mines of Kuala Lumpur in the State of Selangor, of Sungai Ujong in Negeri Sembilan, and of Larut and Taiping in Perak were run for the Malay rulers by Chinese managers providing coolie labor and true is true and true is true and true is true and true is true and true is true .
sentence2: The Chinese labor was seen as less costly and more expendable by the Malay ruling class.