In 1751, He Xiang wrote an essay titled "Arguments against Settling the Li and Establishing Counties." In it he explained that Hainan was dangerous not because the Hlai people were fierce, but because of malaria and poisonous animals. He mocked previous campaigns against the Hlai for conquering hamlets of no value or significance while several thousand troops died of malaria. The highlands inhabited by the Hlai were also not economically valuable, and therefore had not yet been transformed. While many Chinese generals had made a name for themselves by "settling Guangdong", they all left the Hlai alone.