Maybe every man has had two such women, at least two. Married to a red rose, over time, the red becomes a mosquito blood stain on the wall, while the white remains "moonlight before the bed"; married to a white rose, the white becomes a grain of sticky rice on the clothes, while the red remains a cinnabar mole on the heart.

The key to success is persistence, persistence, and more persistence.

Chemistry is not just about what you can make, but how you can make it.