Five. Inquiring about the introduction of tuyeres in 2022, it is found that there are five tuyeres, coal riding the dust, the consumer side counterattacking, and the supply and marketing cooperatives, new creations and antibacterial fabrics are overwhelmed. Year, month and day refer to time units. People formed the concept of "day" according to the phenomenon that the rotation of the earth leads to the alternation of day and night. According to the concept that the moon revolves around the earth to form a "moon" and the concept that the seasons alternate to form a "year" caused by the earth's revolution around the sun.