When I was in school, my math teacher once said: A prime number refers to a natural number greater than 1 that is not divisible by other natural numbers except 1 and the integer itself. In other words, a natural number with only two positive factors (1 and itself) is a prime number.
Many years later, many years after Su Shu stopped learning mathematics, she still remembered this definition as clearly as yesterday.
She smiled bitterly. She was probably the only prime number that had lost the "one" number.
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Love has thousands of forms in the hearts of people in the world, but in Su Shu's heart, it is probably a self-salvation.
Destroyed by love, reborn by love.
Some people say that they have loved each other, Su Shu thought, but love is always there.