People have always thought of Qinghai as melodious pastoral songs, herds of cattle and sheep, green grass, blue sea and blue sky, but in such a place there is a paradise of lilacs. There is a story about lilacs: Every lilac has four petals, but one lilac has five petals. If you find the fifth petal of a lilac, you will find the one you love. If you eat the fifth petal, you will love the person you like for the rest of your life. I only heard this when I grew up. Now that I think about it, it might be true.