The living habit of the British is to go to work at 9 am. Their life is completely arranged according to the biological clock of nature, which conforms to the principle of health preservation in Huangdi Neijing. Do not exercise after getting up in the morning, because the dust in the air is attached to the air at this time, and the air quality is the worst. They choose to cook breakfast for their families at home, and have a healthy package with reasonable nutrition. Breakfast usually starts at 7 o'clock and is divided into European or English set meals. Most people choose the latter. The contents include: bread, ham, tomatoes, milk, honey and black tea.