19. The Forbidden City in Beijing, from which the emperors ruled by heavenly mandate, was a site which a commoner or foreigner could not enter without any permission, on pain of death.
(C) which no commoner or foreigner could enter without permission
不太理解该句的结构,谁能帮分析一下?特别是随后部分on pain of death,不知道他是跟那句连着的啊?觉得这句话很突兀。谢了!还有without 后面为啥不能加any呢?