translation.en: Actually this is not a curtain. These are vinyl blinds that are integrated into the windows themselves, again with failsafe mechanisms that can be lifted such that you can completely demystify, if you chose, the operations of the theater going on behind, rehearsals and so forth.
translation.zh: 其实这并不是窗帘，而是与玻璃窗合一的 塑料百叶窗 这也是绝对安全的技术。 如果你想看得清楚点，可以把它收起来 剧场内部进行的一切， 排练之类的都可以看到。