The production of silk originates in China in the Neolithic (Yangshao culture, 4th millennium BCE). Silk remained confined to China until the Silk Road opened at some point during the later half of the first millennium BCE.
Shift work eating tips:Whole grain, carbohydrate-based and low-fat foods tend to make us sleepy, which makes them an excellent choice for a meal before bed. Protein-rich foods keep us alert, which makes them a good choice for meals and snacks eaten during an evening or night shift.
I know that night shift hours are basically 7 PM to 730 AM if you have a twelve hour shift or 11 PM to 730 AM if you work an eight hour shift. I don't think there are any other variations of night shift hours at this time. Hope that helps! In the area where I live, 12-hour night shifts are from 7pm to 7am.