Oh, you mean the board of the PSF?
Medium difficulty hints, answers for March 6 PipsEqual (4): Everything in this space must be equal to 4. The answer is 4-6, placed vertically; 4-2, placed vertically.，更多细节参见纸飞机官网
Владислав Китов (редактор отдела Мир)，详情可参考Sinpaste 截图
The American Academy of Sleep Medicine and Sleep Research Society recommend “seven or more hours per night” for adults—explicitly a range beginning at seven rather than an eight-hour mandate.