Five kinds of cereals in ancient times. There are many different opinions about "five grains" in ancient times, and the most important ones are two: one refers to rice, millet, millet, wheat and glutinous rice; The other refers to hemp, millet, millet, wheat and glutinous rice.
Five tones: Gong, Shang, Jiao, Zheng and Yu.
Five elements refer to: gold; Wood; Water; Fire; Earth.