This hexagram's name is "Sui," meaning to follow or to go along with. It reveals the principle of conducting oneself in the world with honesty and integrity, acting according to the times, and choosing to follow what is good. "Sui" means to follow; it signifies going with the flow, like marrying a chicken and following a chicken, or marrying a dog and following a dog. Everything requires following circumstances and external environments, being amiable with others without being attached. Zhen (Thunder) represents yang and masculinity, the eldest son, while Dui (Lake) represents yin and femininity, the young daughter. However, the masculine can yield to the feminine, humbling oneself to follow others, thus creating harmony and agreement. This leads to an auspicious and harmonious image when matters are accomplished. Zhen (Thunder) belongs to yang wood, so it also implies that withered wood can bloom again by the Dui (Lake), indicating that if one can transform in all matters, changing one's mindset and concepts, there will be new prospects. In ancient times, Sun Bin, when breaking Qin, divined this hexagram and knew this battle would be won. This is because the hexagram depicts thunder hidden at the bottom of the lake, deep and unfathomable. The enemy is outwardly visible while we are hidden; waiting for the opportune moment to strike the enemy unprepared guarantees victory.