About “Six Secret Teachings”
The Six Secret Teachings is a treatise on civil and military strategy traditionally attributed to Lü Shang, a top general of King Wen of Zhou, founder of the Zhou dynasty, around the eleventh century BC. Modern historians nominally date its final composition to the Warring States period, though some believe it preserves vestiges of ancient Qi political and military thought. (Summary adapted from Wikipedia, CC BY-SA 4.0.)