Theory-of-mind reasoning in Ancient China

Ancient Chinese literature on strategic theory goes back to ideas proposed almost 3000 years ago, but which were first written down during the late Spring and Autumn period and the Warring States period (around 500 BC). The most famous work is the Art of War from Sun Tzu. While Sun Tzu extensively recommends to prepare before going to war and to study and exploit the strengths and weaknesses of your opponent, he doesn't explicitly mentions to investigate the possible reasoning of your opponent. There is no visible trace of Theory-of-Mind reasoning in his work. More recent literature, like the famous classic historic novel Three Kingdoms (believed to have been written during the 14th Century), which describes events during the period 168 to 280 AD, contains instances of Theory-of-Mind reasoning. The question thus arises when the ancient Chinese did invent Theory-of-Mind reasoning as a concept, and why they seem not to have used it in their extensive Strategic theories