https://zh.cemle.com/post/according-to-the-occupational-safety-and-health-law-when-a-public-institution-and-a-contractor-and-then-a-contractor-employ-workers-to-work-together-the-person-in-charge-of-the-workplace-shall-be-designated-by-which-of-the-following-to-direct-and-coordinate-the-work