Did Nu Wa create man from Shan Hai Jing?

No, Nu Wa's creation of human beings is an ancient myth and legend, and there is no specific book. In Shan Hai Jing, Nu Wa's intestines were transformed into 10 gods, but there was no Nu Wa who created human beings and no goddess who filled the sky. The earliest written record about Nu Wa's creation of man is Custom Yi Tong in the Eastern Han Dynasty, and the goddess of mending heaven is Huainanzi in the Western Han Dynasty.