Is “Looking up and observing, looking down and examining, he began to draw the Eight Trigrams” true?

The Records of the Grand Historian, in the chapter 'The Grand Historian's Self-Preface', says: 'Fu Xi was extremely pure and kind, and created the Eight Trigrams of the Changes.' As the cultural ancestor of Chinese civilization, Fu Xi's achievement of drawing the Eight Trigrams is undisputed in pre-Qin and Han dynasty texts, with consistent records.