This is true, and it refers to the empress Leizu who lived around the time, and who is believed to have discovered silk. However, the earliest sources speak of 3500 BC- so a lot earlier, but yes, they could produce silk by 2700 BC
Explanation:
you watch the weather. he had experience winter days with blue skys and Northwest winds, where the temperature would hold steady during the day then sink below freezing at night. The stiff the Northwest wind had erased 50 degree weather of the previous day.
I have done some studying and I believe its tribalism.
I hope this helps :)