Sent_en: 2zh Investigations focused on the heavy reliance of unpaid labor in the company's workforce, which Landmark Education calls "assistants" and deems volunteers.
Sent_yy: 调查的重点是公司的劳动力严重依赖无偿劳动力的情况，里程碑教育称之为“助手”并认为是志愿者。