Task: Explanation
Input (English): Yang Zhu (; 440–360 BC), also known as Yang Zi or Yangzi (Master Yang), was a Chinese philosopher during the Warring States period. An early ethical egoist alternative to Mohist and Confucian thought, Yang Zhu's surviving ideas appear primarily in the Chinese texts "Huainanzi", "Lüshi Chunqiu", "Mengzi", and possibly the "Liezi" and "Zhuangzi". Question: Who was an early ethical egoist alternative to the philosophy also known as Ruism? Answer: Yang Zhu
Output (English):  An early ethical egoist alternative to Mohist and Confucian thought, Yang Zhus surviving ideas appear primarily in the Chinese texts Huainanzi, Lüshi Chunqiu, Mengzi, and possibly the Liezi and Zhuangzi.