A suet-fat jade plaque stained with chalk dust and a frayed red rope made high school mathematics teacher Lin Shuyue the most bizarre "living evidence" of Wu's anniversary.
——This puzzle that has lasted for thousands of years finally found its only solution when the red rope broke:
The greatest proof is for history books and the future to write the same answer.
Concept: What travels through time and space is never a jade pendant, but mankind's eternal search for truth and goodness.