Explanation: The rapid spread of metaphor. Source: "Three strategies Qin Warring States" heard 'three into a tiger, husband rub ten vertebrae, word of the shift, no wings to fly. 'Hence it is better to give the gift of Matrimony. "
No. 2
The rapid spread of metaphor. "Qin Warring policy 3": "Press 'three into a tiger, and 10 fu Rou vertebrae, word of the shift, no wings and fly.' Hence it is: why not give the gift of Matrimony."